Explanation:
The central nervous system controls most functions of the body and mind. It consists of two parts: the brain and the spinal cord. The brain is the center of our thoughts, the interpreter of our external environment, and the origin of control over body movement.
Explanation:
central nervous system is made up of the brain and spinal cord. it receives and integrate impulses from the receptors and then relays them to effector organs. it is the centre of co ordination.
There are 2 types of endoplasmic reticulums.
Plz explain, i will give brainliest
What are the 2 types?
How are they different from one another?
Explain how their structures are different.
Explain how their functions (jobs) or what they make are different.
2. Why are humans considered animals?
A. Their zygotes undergo changes to turn into a blastula.
B. Human cells have cell walls and are unable to move.
C. Humans can reproduce asexually when under stress,
D. Animals and humans are both uni-cellular organisms.
Answer:
It's A
Explanation:
Had it on a test
Humans are considered animals because as in animals zygotes after cell division turns into a blastula, hence option a is correct.
What are animals?More than any other species, humans are capable of learning new things. Indeed, the majority, but not fully, of what distinguishes us from other animals is anchored in language.
In addition, because we have a backbone, humans are considered to be members of the chordate animal phylum.
The zygote is split into the blastula after fertilization, three germ layers develop in the blastula, which in some species is a hollow ball of cells, during a process known as gastrulation.
Therefore, humans are classified as members of the primate order within the animal group and having the blastula stage, hence option a is correct.
Learn more about animals, here:
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Hurry plz
Select each item in the left column and its match in the right column.
Answer:
Explanation:
Diploid - Having pairs of chromosomes
Chromosome - A strand of DNA wrapped around a protein
Haploid - Having only one set of unique chromosomes
DNA - The molecule that carries genetic information
Sex Chromosome - An X or Y chromosome
Homologous Chromosome - A pair of chromosomes that contain information for the same traits
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Which statement best describes the step in muscle contraction when the sarcomere is the shortest?
A The sarcomere is contracted, and the actin and myosin filaments are partially overlapped.
B The sarcomere is relaxed, and the actin and myosin filaments are partially overlapped.
C The sarcomere is contracted, and the actin and myosin filaments are completely overlapped.
D The sarcomere is relaxed, and the actin and myosin filaments are completely overlapped.
Answer:
C The sarcomere is contracted, and the actin and myosin filaments are completely overlapped.
Explanation:
In rest, the tropomyosin inhibits the attraction strengths between myosin and actin filaments. Contraction initiates when an action potential depolarizes the inner portion of the muscle fiber. Calcium channels activate in the T tubules membrane, releasing calcium into the sarcolemma. At this point, tropomyosin is obstructing binding sites for myosin on the thin filament. When calcium binds to troponin C, troponin T alters the tropomyosin position by moving it and unblocking the binding sites. Myosin heads join the uncovered actin-binding points forming cross-bridges, and while doing so, ATP turns into ADP and inorganic phosphate, which is released. Myofilaments slide impulsed by chemical energy collected in myosin heads, producing a power stroke. The power stroke initiates when the myosin cross-bridge binds to actin. As they slide, ADP molecules are released. A new ATP links to myosin heads and breaks the bindings to the actin filament. Then ATP splits into ADP and phosphate, and the energy produced is accumulated in the myosin heads, which starts a new binding cycle to actin. Finally, Z-bands are pulled toward each other, shortening the sarcomere and the I-band, producing muscle fiber contraction.
In the sarcomere, which is the contractile unit of skeletal muscles, there are
Thick myosin myofilaments in the central region belonging to the A band. Thin filaments united to the Z lines, extending in the interior of the A band until they reach the border of the H band. Thin actin filaments composing the I band, which belong to two sarcomeres adjacent to a Z line.When the muscle contracts, the muscular fiber gets shorter and thicker due to the reduction in the length of the sarcomere. The H line and the I band get shorter. The Z lines get closer to the A band, meaning that they get closer to each other. A band keeps constant in length. This change is produced by movement mechanisms that involve a change in the relative position of actin and myosin filaments.
Answer:
C
Explanation:
edge 2021
Describe the path of light as it travels through a microscope.
Select all the correct answers. Which two examples may be converted into fossil fuel after being buried under pressure for a long period of time?
Answer:
Coal and petroleum.
Explanation:
Coal and petroleum are the two examples that can be converted into fossil fuel after being buried under pressure for a long period of time. Both coal and petroleum formed underground with the presence of very high temperature and pressure. Coal is formed when the plant material is placed under high temperature and pressure for thousand of years while on the other hand, petroleum formed when dead bodies of animals are present underground for a very long time with a suitable pressure and temperature turn into petroleum.
PLS HELP 20 PTS
Write a supported hypothesis of how the body would react if the peripheral nervous system was shut down while the central nervous system continues to function.
Explanation:
The real magnitude of this challenge can perhaps be best judged by considering the structural and functional complexity of the human brain and the bewildering complexity of human behavior. The human brain is thought to be composed of about a hundred billion (1011) nerve cells and about 10 to 50 times that number of supporting elements or glial cells. Some nerve cells have relatively few connections with other neurons or with such effector organs as muscles or glands, but the great majority receive connections from thousands of other cells and may themselves connect with several hundred other neurons. This means that at a fairly conservative estimate the total number of functional connections (known as synapses) within the human brain is on the order of a hundred trillion (1014). But what is most important is that these connections are not random or indiscriminate:
They constitute the essential "wiring" of the nervous system on which the extraordinarily precise functioning of the brain depends. We owe to the great neuroanatomists of the last century, and especially to Ramón y Cajal, the brilliant insight that cells with basically similar properties are able to produce very different actions because they are connected to each other and to the sensory receptors and effector organs of the body in different ways. One major objective of modern neuroscience is therefore to unravel the patterns of connections within the nervous system—in a word, to map the brain.
Which of the following types of stars started out on the main sequence with the largest initial mass?
a, b, c, or d?
Answer:
answer: C
Explanation:
hope it helps thanks❤
Hemophilia A is an X-linked recessive disorder. What is the probability that a son will have hemophilia if the parents are a normal man and a woman who is a carrier
Answer:
none
Explanation:
Because the four options are: XX XX Xx Xx. There will be a 50% chance of a carrier but no actual hemophilia.
The probability that the son will have hemophilia if the parents are a normal man and a woman who is a carrier is 50%. The correct option is C.
What is Hemophilia A?A deficiency in the blood clotting factor VIII results in hemophilia A, an inherited bleeding disorder. Lack of factor VIII prevents the blood from clotting effectively to stop bleeding.
Due to a rare disorder called hemophilia, the blood does not clot normally because it lacks enough blood-clotting proteins. If you have hemophilia, you may bleed more profusely and for a longer period of time than you would if your blood clots normally.
A pedigree can be used to trace the X-linked recessive disorder (Xh) hemophilia through the generations. This (D) had hemophilia and passed away as a result of complications. Hemophilia is a bleeding disorder that causes abnormal blood clotting, which lengthens the time it takes for an injury to bleed.
Therefore, the correct option is C, 50%.
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The question is incomplete. Your most probably complete question is given below:
- 0%
- 25%
- 100%
- 50%
- 75%
why does having genetically diverse population make a species more likely tto survive a change to the enviorment .
Answer:
the answer is that genetic diversity serves as a way for poulplation to adapt to changing envirements
Explanation:
i asked my collage science teacher
Answer:
They are more likely to have individuals with an adaptation.
Explanation:
This table shows the codons found in messenger RNA (attached). Using this information, what sequence of nucleotides in the template strand of DNA could code for the polypeptide sequence Val-His-Thr?
A. GUA-CAU-ACC (THIS IS WRONG)
B. GTA-CAT-ACC
C. CAT-GTA-TGG
D. CAU-GUA-UGG
Please explain, I'm very confused about this topic and I want to learn about it. No false answers or you will immediately be reported. Thanks in advance!
Answer:
A
Explanation:
The correct answer would be option A - GUA-CAU-ACC
Looking at the table of codons, for the amino acid Val, the first base (which is on the 1st column in the 6th row) is G while the second base (2nd column, 2nd row) is U. The third column can be any of U, C, A, or G (6th column, 4th row). Hence, GUA is plausible
For the amino acid His, the first base is C (1st column, 2nd row), the second is A (4th column, 4th row) while the last could be any of the 4 bases. Hence, CAU is plausible.
For the amino acid Thr, the first base is A (first column, 5th row), the second is C (3rd column, 2nd row) while the 3rth could be any of the 4 nucleotide bases. Hence, ACC is plausible.
Therefore, the correct sequence of nucleotides for Val-His_Thr would be GUA-CAU-ACC
can someone help me complete the unfinished DNA strands please?
Answer:
it is T G C A T
Explanation:
as in DNA adenine pairs with thymine and cytosine with guanine. You can also remember it as Apple Tree and Car Garage
difference between clarias gariepinus and hetrobranchus bidorsalis?
Answer:
The clarias gariepinus or african sharptooth catfish , belongs to the Clariidae family of airbreathing catfishes. They exist in freshwater lakes, rivers, and swamps, as well as man-made environments like oxidation ponds and even urban sewage systems, throughout Africa and the Middle East.
Hetrobranchus bidorsalist, he African catfish, sometimes known as the eel-like fatty fin catfish, is an airbreathing catfish found in Africa. It has a lot in common with the vundu catfish, which is well-known among anglers.
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Give two reasons why humans need a balanced ecosystem.
Answer:
1To purify the air so we can breathe properly
2Sequester carbon for climate regulation
What is produced during the Krebs cycle?
A. carbon dioxide
B. glycogen
C. oxygen
Links and random responses will be reported
Answer:
A. carbon dioxide
Explanation:
For one cycle, two molecules of carbon, three molecules of NADH, one molecule of FADH2 and one molecule of ATP or GTP are produced.
Given their size and complexity, biological molecules such as carbohydrates, proteins, lipids, and nucleic acids can also be referred to as ____________.
Answer:
This question lacks options, the options are;
A. Enlarged molecules
B. Macromolecules
C. Inorganic molecules
The answer is B
Explanation:
As mentioned in this question, carbohydrates, proteins, lipids, and nucleic acids are the basic biomolecules found in nature. They are all polymeric substances, hence, are made up of smaller units called monomers.
Asides from being biomolecules, these four molecules are also referred to as MACROMOLECULES based on their large size and complex nature. Macromolecules are molecules that are relatively large in size composing of an aggregate of monomer. Hence, these biomolecules are macromolecules.
Question in the photo
Answer:
C
Explanation:
From reading what the process is, I think the answer should be C. The definition always says that you get energy from a chemical reaction and the products are CO2 and water. That can only mean that you have a hydrocarbon burning.
Chemically it looks like
C6H12O6 + 6O2 ====> 6CO2 + 6H20
Molecules that do not contain carbon are called inorganic.
true
false
Answer: true
Explanation:
it does contain carbon
Organic molecules contain carbon and inorganic molecules do not contain carbon. Organic molecules are synthesized by living things and inorganic molecules are not. Organic molecules are consumed by living things and inorganic molecules are not. All organic molecules contain carbon, bonded to other elements.
So true.
Describe how pollution can cause acid rain, and how acid rain affects the ecosystems of surrounding areas?
Pollution specifically air pollution can cause acid. Gases such as sulphur (IV) oxide and Nitrogen (IV) oxide when they are released into the atmosphere and comes into contact with precipitation, that is rain water causes acid rain. Sulphurous acid and Nitric acid is formed thus the rain falls in acidic form.
Acid rain when it falls on the leaves of the flora (plants) causes removal of the green colouring matter (chlorophyll) thus making plants to be deficient of food. Food in plants is made my the process of photosynthesis, removal of chlorophyll in plants kills them due to lack of food.
Also when acid rain finds it's way into the water bodies through surface runoff, aquatic animals such as fishes die due to lack of favourable environment and oxygen deficiency in water. Acidity in the soil also kills important decomposers therefore soil aeration is altered.
Which is NOT involved at the beginning
of a nerve impulse?
A. reaching the threshold
B. strong stimulus
C. sodium leaving the cells
D. negative charge inside the cell
Answer: the answer would be C
Sodium ion do not leave at the beginning of the nerve impulse.
They leave after the gated channel opens up after receiving a stimulus.What is a nerve impulse? It is an electrical signal that travels along a nerve fiber in response to a stimulus and serves to transmit record of sensation from a receptor or an instruction to act to an effector.Nerve impulse begin at dendrite and then move toward the cell body of neuron.To know more about nerve impulse here
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A 70-year-old male presents with back pain, fever, and weight loss. He reports that he had a recent respiratory infection from which he thought he recovered. Tests revealed increased white blood cell count, and a diagnosis of endogenous osteomyelitis was made. The primary organism causing this condition is
Answer:
This question lacks options, options are:
a.Fatigue fracture
b.Stress fracture
c.Pathologic fracture
d.Greenstick fracture.
The correct answer is c.
Explanation:
A pathological fracture is one produced in a weakened bone as a result of trauma that would not cause such an effect on bones that had their composition, resistance or flexibility properties at the correct levels, that is, a pathological fracture is any loss of bone continuity that occurs in a weakened bone, secondary this weakness to the development of a disease. Endogenous osteomyelitis is a blood-borne bacterial infection that spreads to the bone.
Bacteria are organisms that reproduce asexually. How is it better for them than reproducing sexually.
Answer: they don't have a reproductive system
Explanation:
Orcas, or killer whales, are natural predators of sea otters. It has been observed that in regions where the sea otters are not present, sea urchins grow rapidly and destroy much of the natural kelp vegetation. Which of these statements is correct in this context?
Answer:
D) Sea otters are a keystone species as they prevent a herbivorous species from completely destroying a plant species.
Explanation:
Which is an example of temporal isolation?
flowers that bloom in different months
birds that have different mating calls
fruit flies that mate in different locations
squirrels that have different fur colors
Flowers that bloom in different months is an example of temporal isolaton.
What is temporal isolation?Temporal isolation is a type of reproductive isolation that occurs when two or more species reproduce at different times, thereby preventing mating between them. This can happen in a variety of ways, such as when one species is active during the day and the other at night, or when they breed during different seasons.
Temporal isolation can lead to the evolution of new species because it prevents interbreeding between populations that would otherwise exchange genetic material. Over time, these isolated populations can accumulate genetic differences that make it increasingly difficult for them to interbreed, leading to the formation of distinct species that are reproductively isolated from one another.
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Identify the object with greatest inertia.
Bowling ball
Tennis ball
Billiard ball
Basket ball
Answer:
Bowling ball
Explanation:
The plant coleus has three distinct leaf color phenotypes: green, white, and variegated (white and green mixed) the crosses are made as follows: female variegated leaves × male green leaves gives offspring with all variegated leaves female green leaves × male with white leaves gives offspring with all green leaves female with white leaves × male with variegated leaves gives offspring with all white leaves This is an example of ________.
Answer:
Cytoplasmic inheritance
Explanation:
female variegated leaves × male green leaves ⇒ all variegated leaves female green leaves × male with white leaves ⇒ all green leaves female with white leaves × male with variegated leaves ⇒ all white leavesFrom these crosses, we can notice that only the female´s phenotype is expressed in the progeny, independently of the male´s phenotype. Whenever this occurs, it is probably due to the action of cytoplasmic inheritance.
Extrachromosomal or cytoplasmic inheritance refers to hereditability transmission controlled by cytoplasmic genes.
This form of inheritance lays in genes that are out of the nucleus. Even though most of the DNI is located in the nucleus, information for some characters is placed in organelles in the cytoplasm, such as mitochondria and chloroplasts. These organelles have a well-defined portion of the total cellular genome.
When a female expresses a trait that is defined by genes in the organelles, the whole progeny expresses the same trait as the female.
Mitochondrial inheritance is mostly maternal, but recent studies have demonstrated that it might also be paternal.
The described experiment is an example of Cytoplasmic inheritance.
What do you mean by Phenotypes?Phenotypes may be defined as the appearance or manifestation of a character. Phenotypes are also known as traits.
Cytoplasmic inheritance reveals the phenotypes of offspring according to female parents. In this mode of inheritance, characters or traits are stored in the organelles like chloroplast, and mitochondria, as well as in the cytoplasm.
Therefore, the described experiment is an example of Cytoplasmic inheritance.
To learn more about Cytoplasmic inheritance, refer to the link:
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Genes for the oxygen-carrying proteins hemoglobin and myoglobin descend from a common ancestor but act in very distinct ways today. They are _____. Group of answer choices paralogous shared ancestral characters paraphyletic horizontally transferred
Answer: paralogous
Explanation:
Paralogous genes are a class of homologous genes which are due to the duplication of gene, then this are refered to as paralogous.
Genes for the oxygen-carrying proteins hemoglobin and myoglobin descend from a common ancestor but act in very distinct ways today. They are referred to as paralogous.
The use of another orga....
Answer:
C biological control.
Explanation:
Biological control because a natural organism is controling pest. Unlike using pesticides. That would be chemical control. lol
Answer:
C. Biological Control
Explanation:
The use of biological beings such as organisms to control pest andm uch more is considered to be Biological Control
write an account of the different methods of protecting endangered species of animals and plants around the world. include the use of legalisation in your answer 6
QER
Answer:
Provide suitable place, making laws and reduce pollution.
Explanation:
Provide suitable place where they can breed without disturbance, making laws to forbit hunting of endangered species and reduce pollution are the different methods that can protect endangered species of animals and plants around the world. For increase in population, suitable environment is required so that they have no predators or other factor that adversely affect their growth. The laws to forbit hunting or killing has also a significant effect on endangered species. Pollution is the main reason for change in the environment that make the environment not suitable for animals and plants.
What is a group of organisms that are able to interbreed and form viable offspring?
A.Species
B.Genus
C.Taxonomy
D.Similar organisms
