Organisms classified using a dichotomous key are based on their observable physical or structural characteristics. A dichotomous key is a tool that helps in identifying an unknown organism by asking a series.
What is an organism ?An organism is any individual living thing, such as a plant, animal, fungus, bacterium, or protist. It is a complex, organized, and self-sustaining entity that exhibits the characteristics of life, including the ability to grow, reproduce, respond to stimuli, and maintain homeostasis.
Organisms can be unicellular or multicellular, and they can exist in a wide range of environments, from the deep ocean to the forest floor. They are composed of cells, which are the basic units of life, and each cell has its own specific function that contributes to the overall function of the organism.
Organisms are classified into different taxonomic groups based on their characteristics, such as their cell type, mode of nutrition, and reproductive strategies. These groups include kingdoms, phyla, classes, orders, families, genera, and species.
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Select the parts that make up the backbone of the DNA molecule. Select the TWO answers that are correct. a. sugar b.glycine c.nucleoside d.phosphate e.nitrogenous base
The backbone of the DNA molecule is composed of sugar and phosphate groups. These components are connected by phosphodiester bonds, which alternate to form a long chain.
The correct answers to the question “Select the parts that make up the backbone of the DNA molecule” are a. Sugar and d. Phosphate. Sugar (deoxyribose) and phosphate molecules are the two primary components of the DNA backbone. The sugar and phosphate molecules alternate to form the long chain that makes up the backbone. The nitrogenous base, which is bonded to the sugar, extends away from the backbone and pairs with its complementary base on the opposite strand to form the DNA molecule's double helix structure. Nucleoside is a combination of a sugar molecule (ribose or deoxyribose) and a nitrogenous base. These components are used to create nucleotides. Glycine is an amino acid, which is a component of proteins, not DNA. The nitrogenous base is bonded to the sugar and extends away from the backbone, as mentioned above. However, it is not a component of the backbone itself, so it is not a correct answer to this question.
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the gives us the distinct qualitys that make us human and allows us to think about the future to be playful and creative
Answer:
Brains
Explanation:
the brain gives us the distinct quality that make us human and allows us to think about the future to be playful and creative
what happened to the e. coli cells you spread on the lb/ampicillin plates that did not contain a pclone plasmid?
The E. coli cells that were spread on the LB/Ampicillin plates that did not contain a pclone plasmid would not have been able to grow properly on the plates.
What is pclone plasmid?
The e. coli cells that were spread on the lb/ampicillin plates but did not contain a pclone plasmid would not have grown on the plates. The pclone plasmid is generally used to generate clones and for research purposes. E. coli cells that contain pclone plasmid are able to grow in the presence of ampicillin antibiotic, while the cells that do not contain pclone plasmid cannot grow in the presence of ampicillin antibiotic.
The growth of the E. coli cells on the LB/ampicillin plates would indicate that the cells have the pclone plasmid. Cells that did not grow on the plates would indicate that they did not have the plasmid.
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what is shift in vaginal flora suggestive of bacterial vaginosis meaning?
In bacterial vaginosis, the vaginal flora shifts from normal aerobic flora to anaerobic one.
Bacterial vaginosis is the condition where bacterial growth becomes excessive. The vagina normally harbors a variety of bacteria, but in limited quantities. This condition is characterized by the flow of vaginal discharge which has a distinct odor.
Vaginal flora refers to the bacteria living inside the vagina of females. These bacteria usually belong to the Lactobacillus species. The shift in there population occurs when the normal pH of the vagina is disturbed. This causes the bacteria to overgrow anaerobically and cause the disease.
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The two main classes of molecules that function as hormones are steroid hormones and hormones that are derived from
A. long-chain fatty acids
B. mucleaic acids
C. cholesterol
D. carbohydrates
E. amino acids
Option E. The The two main classes of molecules that function as hormones are steroid hormones and hormones that are derived from
What are amino acid?The two main classes of molecules that function as hormones are steroid hormones and hormones that are derived from amino acids.
Steroid hormones are derived from cholesterol, while hormones derived from amino acids include peptides, proteins, and amines.
Long-chain fatty acids and carbohydrates are not typically involved in hormone signaling.
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2. Compare the environment in which physical weathering is dominant to the
environment in which chemical weathering is dominant.
Answer:
chemical weathering is more dominant in the regions where there is abundant limestone rock.
Explanation:
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Frieda is in tenth grade and decides to try out for the track team. Which of the following is anexample of selection?Frieda decides that trying out for the track team is more important than studying for her mathtest.Frieda plans to run four days a week to train for the team.Frieda asks another student on the track team to help her train.Frieda misses one of her training sessions and decides to give up some of her allotted free timeto train
The following is an example of selection: Frieda decides that trying out for the track team is more important than studying for her math test.
Selection is the process of selecting or rejecting an object on the basis of certain criteria. It is defined as the process of choosing or rejecting something based on certain criteria. Thus, in the given question, Frieda decides that trying out for the track team is more important than studying for her math test is an example of selection.Selection is one of the essential tools used in statistics to arrive at a conclusion. In this process, we select a few samples from a population for statistical analysis.Frieda planning to run four days a week to train for the team, Frieda asking another student on the track team to help her train, and Frieda missing one of her training sessions and deciding to give up some of her allotted free time to train are not examples of selection.Learn more about statistical analysis: https://brainly.com/question/17663093
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Who are the 2 scientists that influenced Darwin's theory of evolution?
The two scientists that influenced Darwin's theory of evolution are Thomas Malthus and Charles Lyell.
Evolution is defined as the process of gradual development or changes of an organism's features over time as a result of changes in genetic and environmental factors. The theory of evolution, as proposed by Charles Darwin, is the most widely recognized scientific theory that explains how organisms change and adapt to their surroundings.The theory of evolution proposes that all species on Earth have evolved from a single common ancestor through a process of natural selection. According to Darwin's theory of evolution, organisms that possess favorable characteristics for their environment are more likely to survive and pass on those characteristics to their offspring. Those organisms that are less well-suited to their environment will not survive and their traits will eventually be lost over time.In the development of his theory, Darwin was influenced by the works of several scientists including Thomas Malthus and Charles Lyell. Darwin incorporated their ideas into his own to produce the theory of evolution. Malthus argued that human population growth was limited by food supply, and this idea provided Darwin with the concept of natural selection. Lyell's work in geology proposed that the Earth's surface has been shaped over a long period of time by gradual processes, and this helped Darwin to understand the concept of slow changes in species over time.Learn more about Darwin's theory of evolution: https://brainly.com/question/1589147
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which description is correct regarding how the majority of oxygen is transported to cells and tissues?
The correct description regarding how the majority of oxygen is transported to cells and tissues is by binding to hemoglobin in red blood cells. Oxygen can be transported in the blood in two ways: dissolved in the plasma or chemically bound to the protein hemoglobin in red blood cells.
Hemoglobin is an iron-containing protein in red blood cells that binds to oxygen and carries it from the lungs to the body's tissues and organs. Hemoglobin is the most abundant protein in red blood cells, and each hemoglobin molecule can bind up to four oxygen molecules.
When oxygen binds to hemoglobin, it forms oxyhemoglobin, which is a bright red pigment. This is why oxygen-rich blood is bright red in color.
The majority of oxygen is transported to cells and tissues by binding to hemoglobin in red blood cells. This process is known as oxygen transport, and it is essential for delivering oxygen to all parts of the body.
In summary, the correct description regarding how the majority of oxygen is transported to cells and tissues is by binding to hemoglobin in red blood cells.
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What is the pair of chromosomes inherited from the mother and the other pair from the father?
A pair of chromosomes inherited from the mother and the other pair from the father is called a homologous chromosome pair.
Homologous chromosomes are similar in size, shape, and gene content and carry the same genes at the same loci, although the specific alleles may differ. In humans, the homologous chromosome pairs form the 23 pairs of chromosomes that contain the genetic material necessary for the development and functioning of the organism.
During sexual reproduction, each parent contributes one set of chromosomes, including one member of each homologous chromosome pair, to their offspring. The process of meiosis ensures that each gamete receives one member of each homologous pair, resulting in genetic diversity in the offspring.
This means that the genetic material inherited from the mother and father are combined in their offspring, leading to genetic variation within a population. The study of homologous chromosomes is essential for understanding genetics, inheritance patterns, and evolutionary biology.
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Baby Jessica's parents respond to her every need as soon as she cries. Freud would predict that, as an adult, Jessica will ________.a. become sexually promiscuousb. be well adjustedc. be passived. rebel against authority figures
Baby Jessica's parents respond to her every need as soon as she cries. Freud would predict that, as an adult, Jessica will be passive.The correct answer is c.
According to Freud's psychoanalytic theory, a child's first relationships are with its mother, and it is in these relationships that the ego emerges. The id, ego, and superego are the three components of the mind (conscious and unconscious) that have an impact on behavior.
The id is the instinctual side of the psyche that is driven by the need for immediate gratification, while the ego is the logical side of the psyche that helps to mediate the conflict between the id and the superego.The parents of Baby Jessica's are providing her with immediate gratification by responding to her every need as soon as she cries.
Freud would predict that Jessica would be passive as an adult because she would not be learning how to delay gratification, which is a critical skill for developing a healthy ego. Delaying gratification involves recognizing that immediate gratification may not be the best course of action in the long term.
In conclusion, Baby Jessica's parents respond to her every need as soon as she cries. Freud would predict that Jessica would be passive as an adult because she would not be learning how to delay gratification, which is a critical skill for developing a healthy ego.
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What is a similar structure in different species that evolved separately called?
The similar structure in different species that evolved separately is called a convergent structure.
The term “convergent structure” refers to the process by which distinct species with different ancestors develop similar structures, either through adaptation to similar environmental conditions or similar ecological roles.
This phenomenon, known as convergent evolution, typically results in different organisms developing similar adaptations to solve the same problem.
Both structures have evolved to perform the same task (flight), and both have independently evolved to do so due to selective pressure in a specific habitat.
A similar structure, shared by different species, is termed homology when it is derived from a common ancestor, and analogy when it is not.
The similarity between bat wings and bird wings is a classic example of analogy, since these structures did not evolve from a common ancestral structure but instead emerged independently in response to selective pressure.
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Neurons have processes called ______ that receive signals from other neurons.
Neurons have processes called dendrites that receive signals from other neurons.
Dendrites are branched structures that extend from the neuron's cell body and are the main points of contact between a neuron and its neighbors. They receive signals in the form of electrical impulses and chemicals called neurotransmitters from other neurons, and they then transmit this information to the neuron's cell body. The cell body then decides whether the neuron will send a signal down its axon to other neurons. In summary, dendrites are the input points of neurons, receiving information from other neurons and then relaying this information to the neuron's cell body.
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Describe how substances that pollute air and water could be harmful to humans and
other living organisms.(4 marks)
Surfaces of water and soil can become contaminated by air pollution. This may cause crop death or lower crop yield. Young trees and other plants can die as a result. Acid rain can be produced when airborne sulphur dioxide and nitrogen oxide particles combine with atmospheric water and oxygen.
What contributes to air pollution?Solid, liquid, and certain gases that are suspended in the air are the main contributors to air pollution. These gases and particles can come from factories, dust, pollen, mould spores, volcanoes, wildfires, and vehicle and truck emissions. Particle pollution, commonly known as particulate matter (PM), is made up of microscopic fragments of solids or liquids in the atmosphere. People are responsible for the majority of air pollution, which manifests as emissions from factories, vehicles, aircraft, or aerosol cans. Air pollution also includes secondhand cigarette smoke. These pollution-causing human activities are referred to as anthropogenic sources. Industry sources, power plants that provide electricity, fossil fuel-powered cars, and other stationary sources all contribute significantly to air pollution.To learn more about pollute air, refer to:
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Substances that pollute air and water can be harmful to humans and other living organisms in a number of ways, such as causing respiratory problems, cardiovascular disease, cancer, etc.
What is pollution and cardiovascular disease?Air pollution can irritate the respiratory system and cause inflammation in the lungs, leading to a range of respiratory problems. For example, particulate matter (tiny particles of dust, dirt, and soot in the air) can cause bronchitis, asthma attacks, and other respiratory problems. Exposure to air pollution has been linked to an increased risk of cardiovascular disease, including heart attacks, strokes, and hypertension, and some air pollutants, such as benzene and PAHs, have been linked to an increased risk of cancer. These pollutants can damage DNA and cause mutations that can lead to cancerous cells.
Hence, substances that pollute air and water can be harmful to humans and other living organisms in a number of ways, such as causing respiratory problems, cardiovascular disease, cancer, etc.
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Lesson 4 Invertebrate Evolution and Diversity 1
I need help with this lesson if anyone could help me today
Invertebrate don't have or develop a vertebral column, also known as a backbone or chine. Insects, spiders, prawns, draggers, oysters, squids, octopuses, earthworms, moochers, and doormat are all exemplifications of pets.
Elaboration of Invertebrate
The first bitsy critter appeared in the ocean3.5 billion times agone . The first pets were born in the water. Cambrians, for illustration, were soft- bodied creatures with a carapace or shell.
Brute bracket
The elaboration of pets has established numerous abecedarian characteristics of advanced organisms, from the foremost sponger species to the more recent echinoderms.
What's biodiversity, and why is it important?
Biodiversity refers to the cornucopia and diversity of life on the earth, and it's our earth's most complicated and vital characteristic. Life couldn't live without biodiversity.
Biodiversity bracket
Diversity is classified into three orders
inheritable Biodiversity
Species Biodiversity
Ecological Biodiversity
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Complete Question:
What are Evolution of Invertebrates: Symmetry & Specialization? Also mention what is biodiversity?
simple spinal reflexes occur independent of the brain.truefalse
Simple spinal reflexes occur alone in the brain. Harm to the ventral foundation of a spinal nerve would imply that the tactile gift of the reflex circular part would be raided. For the spinal cord to process a reflex arc, interneurons must be involved. The correct answer is true.
Control centers in the brain have a significant impact on spinal reflexes. Axons originate in a variety of brainstem and cerebral cortex centers and synapse primarily with spinal interneurons, with some providing direct input to motor neurons.
The brain does not participate in a reflex action. These automatic actions are controlled by the spinal cord, which response to stimuli without considering how to respond. The brain does not respond in any meaningful way to it.
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The disaccharide composed of glucose and galactose joined by a glycosidic bond is called
Lactose. A molecule of galactose is combined with a molecule of glucose to form lactose via a 1,4-glycosidic bond. Glucose and galactose combine to form the disaccharide known as lactose.
Two monosaccharide units are joined by glycosidic linkages in either the or orientation to form disaccharides. Lactose, maltose, and sucrose are the three most significant disaccharides. A molecule of glucose and a molecule of fructose are joined to form the compound known as sucrose. Galactose and glucose combine to produce a -14 glycosidic bond, which results in the disaccharide lactose. The formal name of the compound is -D-galactopyranosyl-(1-4)-D-glucose. D-galactose and D-glucose combine to generate 19 distinct disaccharides.
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If conditions are not restore to optimal conditions, the enzymes of the body do not function correctly because they are _____________, potentially leading to organ failure and possible death.
If conditions are not restore to optimal conditions, the enzymes of the body do not function correctly because they are denatured, potentially leading to organ failure and possible death.
The term "denatured" is used to describe the condition of an enzyme that is unable to function properly. When an enzyme becomes denatured, it loses its structure and shape, which causes it to be unable to perform its intended function. This can happen due to a number of different factors, such as changes in temperature or pH levels. When an enzyme becomes denatured, it is unable to interact with the substrate that it is supposed to act on. As a result, the chemical reaction that the enzyme is supposed to catalyze cannot occur. This can lead to a number of different problems within the body, such as organ failure or even death, in extreme cases.
Therefore, it is very important to maintain optimal conditions for enzymes to function properly in the body. Denatured enzymes are unable to carry out their designated chemical reactions, and this can have drastic consequences on the body's metabolic processes.
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Select the correct statement about the Evolution of Animals.
1 The oldest generally accepted fossils of large a
2 No animal fossils are found in strata formed bef
3 Approximately half the phyla of living organisms
4 All the above
The oldest generally accepted fossils of large animals range in age from 565 to 550 m. Option A
What is evolution in animals?Evolution in animals refers to the process of change in the inherited characteristics of a population of animals over time, which occurs through the mechanisms of natural selection, genetic drift, gene flow, and mutation.
Evolution occurs when some individuals in a population possess advantageous traits that allow them to survive and reproduce more effectively than others, resulting in the gradual accumulation of these traits in the population over generations.
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Why is fermentation a required pathway for providing cellular energy when oxygen is unavailable or in insufficient supply? NAD is not regenerated by the electron transport chain. ATP production requires oxygen. NADH cannot be reduced to NAD Cells need either lactic acid or ethanol when oxygen is low, Lactic acid or ethanol can be used to generate oxygen.
Fermentation is a crucial pathway for providing cellular energy when oxygen is unavailable or in insufficient supply, as it allows cells to continue generating ATP by regenerating NAD+ and allowing glycolysis to continue.
Because it enables the regeneration of the oxidized form of the electron transport molecule NAD+, which is necessary for glycolysis to proceed, fermentation is a necessary mechanism for supplying cellular energy when oxygen is missing or in inadequate supply. Pyruvate is produced from glucose during glycolysis, and NAD+ is reduced to NADH. The electron transport chain's ability to convert NADH back into NAD+ in the presence of oxygen permits glycolysis to continue creating ATP. The electron transport chain, on the other hand, is unable to work when oxygen is lacking or insufficiently present, and NADH builds up, which can inhibit glycolysis.
By oxidizing NADH back to NAD during fermentation, NAD+ can be replenished, allowing glycolysis to continue generating ATP. Certain cells, like muscle cells and some microbes, can employ fermentation to make lactic acid or ethanol as end products in the absence of oxygen, allowing them to generate ATP without the need for oxygen.
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In the context of conservation biology, what does genetic diversity mean? a. The total number of species in a given region. b. Number and relative frequency of alleles in a population, species, or lineage. c. A quantity summarzing the average genetic difference between two randomly chosen individuals in a population. d. The number and relative frequency of species in a given region.
In the context of conservation biology, genetic diversity refers to the number and relative frequency of alleles in a population, species, or lineage. So, option B is correct.
The variety in genetic material within and between populations of a species is reflected by genetic diversity, which is a crucial component of biodiversity. Populations with genetic diversity can adapt to shifting environmental conditions, fend off disease, and avoid the detrimental consequences of inbreeding, genetic drift, and other factors that can make populations less fit. For species and ecosystems to survive over the long term, genetic diversity must be preserved.
Option (b) correctly defines genetic diversity as the number and relative frequency of alleles in a population, species, or lineage, while the other options are incorrect.
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which of the following statements is most accurate select an answer and submit. for keyboard navigation, use the up/down arrow keys to select an answer. a hydrogen ions released during lactate production are primarily responsible for blood acidosis b an accumulation of adp during exercise will inhibit creatine kinase activity. c during exercise, glycogen stored in non-exercising muscles help preserve blood glucose levels. d in non-muscle cells, lactate an be converted back to glucose, implying that it is an energy source.
The correct answer is during exercise ,glycogen stored in non-exercising muscles help preserve blood glucose levels.
During exercise, glycogen is stored in non-exercising muscles help preserve blood glucose levels. Glycogen is a storage polysaccharide in animals that is composed of glucose molecules. It is stored in the liver and muscles and is used to provide energy during periods of intense physical activity or fasting. Therefore, during exercise, glycogen stored in non-exercising muscles help preserve blood glucose levels.
This statement is most accurate as blood glucose levels are crucial to maintain energy production during exercise. Glycogen is broken down to release glucose that helps to keep the glucose levels up during the exercise. Hence, the statement "During exercise, glycogen stored in non-exercising muscles help preserve blood glucose levels" is the most accurate statement among the given options.
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The receptor sites where THC binds to produce its effect are found in large numbers in the brain area considered to be the seat of human consciousness, which is the
a. reticular activating system.
b. limbic system.
c. prefrontal cortex.
d. medulla-pons region.
The receptor sites where THC binds to produce its effect are found in large numbers in the brain area considered to be the seat of human consciousness, which is the limbic system.
The limbic system is the part of the brain that is responsible for regulating emotions, memories, and motivational behavior. The hypothalamus, hippocampus, and amygdala are some of the brain regions that make up the limbic system. The limbic system is the seat of our emotions and plays a critical role in learning and memory.
The receptors sites of THC bind with the cannabinoid receptors that are located in the brain areas such as the limbic system and hence produce the effect of THC. This effect of THC is due to the activation of the endocannabinoid system. THC stands for Tetrahydrocannabinol which is a psychoactive component found in the cannabis plant. THC is responsible for producing the high feeling when a person smokes or ingests cannabis products
The use of cannabis and THC has medical uses as well. It can be used to treat chronic pain, nausea, glaucoma, multiple sclerosis, epilepsy, and cancer. THC has potential therapeutic effects but it is also considered as a recreational drug because of its psychoactive effects.
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dna choose... joins choose... to synthesize a new choose... dna strand.
DNA polymerase is an enzyme that joins nucleotides to synthesize a new DNA strand during DNA replication.
The process begins with the separation of the double-stranded DNA molecule into two separate strands by an enzyme called helicase. One of the strands serves as a template for the synthesis of a new complementary strand. DNA polymerase reads the template strand and matches complementary nucleotides to it, adding them one by one in the 5' to 3' direction.
As each nucleotide is added, DNA polymerase catalyzes the formation of a phosphodiester bond between the 3' end of the growing DNA strand and the 5' phosphate group of the new nucleotide. This process continues until a complete new DNA strand has been synthesized.
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commercial meat tenderizers contain papain and/or bromelain, both of which are enzymes used to tenderize meat. what type of organic molecules do these enzymes help break down?
Papain and bromelain are both proteolytic enzymes, which means that they help break down proteins. Specifically, they hydrolyze or cleave peptide bonds between amino acids in proteins.
By breaking down the proteins in meat, these enzymes can help to tenderize it, making it easier to chew and digest. Plant enzymes (such as papain, bromelain, and ficin) have been studied extensively as meat tenderizers. Novel plant proteases (actinidin and zingibain) and microbial enzyme preparations have recently piqued the interest of researchers due to their ability to manage meat tenderization and other benefits.
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What does it mean by Peptide bond?
Answer:
A covalent bond is produced by connecting the carboxyl group of one amino acid to the amino group of another while removing a molecule of water.
Explanation:
Brainliest, please!
What subgroup of protists swims with one flagellum, are mainly photosynthetic, and are common pond dwellers?a) amoebasb) apicomplexansc) ciliatesd) cellular slime moldse) euglenids
A ubiquitous pond inhabitant, the amoebas subgroup of protists swim with a single flagellum and are mostly photosynthetic. Option a is Correct.
Molds that produce slime are considered protists. It consumes decaying plant matter and the bacteria found there. It inhabits soils, woodlands, sewers, and gutters. A photosynthetic protist is not what it is. Although being categorized as fungi for a very long time, slime molds are now part of the class Myxomycetes and belong to the kingdom Protista (the Protists).
Slime molds exhibit characteristics of both fungi and animals. As a result, they are often referred to as fungus animals. They were classified as protistan fungus by modern scientists. While they are in their amoeboid plasmodial stage, they resemble protozoa and resemble real fungus when they produce spores.
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who is known as the father of taxonomy, who developed our modern system of naming organisms?
Baroreceptors in the brain detect blood pressure, and osmoreceptors detect salt concentration in the blood. When changes occur, these receptors send signals to the pituitary to stimulate or inhibit antidiuretic hormone (ADH) release. If a man becomes lost in a desert without water, the receptors in his brain detect changes to his blood pressure and salt levels in his blood that signal the release of ADH into his bloodstream. Predict how the release of ADH will affect his kidneys and his blood vessels. A. Water reabsorption by kidneys and vasoconstriction of blood vessels B. Water reabsorption by kidneys and vasodilation of blood vessels C. Water excretion by kidneys and vasodilation of blood vessels D. Water excretion by kidneys and vasoconstriction of blood vessels
Water excretion by kidneys and vasodilation of blood vessels. Therefore, option (C) is correct.
The brain's receptors will notice variations in blood pressure and salt levels if a man becomes stranded in a desert without water, which will cause the release of antidiuretic hormone (ADH) into his circulation.
ADH, often referred to as vasopressin, works on the kidneys to boost water absorption and decrease water loss through urine production. To preserve water and stop additional dehydration, ADH release will be reduced in the absence of water. The kidneys will expel more water as a result, increasing urine production and reducing water absorption.
ADH is also involved in controlling blood vessel diameter. In this case, the release of ADH will lead to blood vessel dilatation. Despite the limited water supply, vasodilation aids in boosting blood flow to essential organs in an effort to maintain appropriate blood perfusion.
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how is the natural system helpful to the world and others?
Answer: Natural systems provide for our fundamental survival needs. This may seem self-evident, yet it is alarming to realize that younger generations are growing up in homes that are farther away from their sources of concern, a source we schould all be worried about somtime in our life.
Explanation:
