Answer:
Post reproductive isolation → Hybrid sterility
Explanation:
The biological concept of species states that individuals of a species can not mate and reproduce with individuals of another species. But if they get to reproduce, the progeny will not be viable or fertile. There will not be any reproductive success.
There are different reproductive isolation mechanisms, which are barriers that inhibit or interrupt the genetic flow between different species.
Reproductive barriers are isolation mechanisms that prevent mating between two or more species. The prezygotic mechanism avoids fertilization between individuals of different species, while the postzygotic mechanism impedes the zygote to develop and reach the adult stage.
Postzygotic mechanisms or barriers include
Hybrid inviability, Hybrid sterility, Hybrid reduced viability or fertility, Cytoplasmic interactions.In the exposed example, sympatric speciation occurs. It seems that the mountains separating the snails´ populations made a place for speciation and the development of postzygotic barriers, specifically hybrid sterility. After the erosion process, both populations got to meet again. Snails from one population get to mate and produce offspring with the snails of the other population, but their progeny is sterile.
give a reason why lack of roughage in diet often leads to constipation
Answer:
The main cause of constipation is intake of a low fiber diet.the bulk and soft texture of fibre helps prevent hard dry stools that are difficult to pass thereby reducing constipation.
I hope this helps
What is DNA??????????
Answer:
DNA, short for deoxyribonucleic acid, is the molecule that contains the genetic code of organisms. This includes animals, plants, protists, archaea and bacteria. DNA is in each cell in the organism and tells cells what proteins to make. ... DNA is inherited by children from their parents.
Explanation:
DNA (Deoxyribonucleic acid) is a molecule present in the nucleus of cells of all living beings and that carries all the genetic information of an organism.
It is formed by a spiral-shaped double strand (double helix), composed of nucleotides.
a special effects artist mixes two different liquids in a bowl. both liquids are white. when she heats the bowl, a new compound forms. will the new compound be a white liquid?
Answer:
if a special effects artist mixes two different liquids in a bowl and they both are too white !
after heats those liquids
its forms curd like substance
its either will be white, its can increase its colour as darkish white or lightly yellowishblack
when she heats the bowl, a new compound forms and it will be white before heating and after heating it may be white or other dark color.
What are the properties of a compound ?A compound composed up of two or more elements which are chemically combined with a fixed proportion by their mass.
For example, Water, Sodium Chloride, Ammonium Chloride etc.
They have fixed melting and boiling points.
Formation of compound is a change in chemical reaction and the components of compound are mixed in a fixed proportion.
Two major types of compounds are covalent and ionic compounds.
Covalent compounds refers to formation of covalent bond among two nonmetals, like water or methane. These molecules are neutral and weak.
When metal react with non metal it form Ionic compounds, are held together by opposite charges, so the bond is stronger than covalent compound.
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Which structure would you not find in a prokaryotic cell?
Answer:
you won't find the nucleus in prokaryotic cells
Answer: Membrane-bound organelles
Explanation:
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I will mark the Brillianest
Answer:
[tex] \pink{\qquad \boxed{\boxed{\begin{array}{cc} \maltese \: \: \: \bf \: see \: the \: picture \: \: \end{array}}}}[/tex]
is what a drug does to your body. O a) Irrigation b) Pharmacodynamics c) Excretion d) Pharmacokinetics
Explanation:
Option b is the correct one
DNA is negatively charged. Therefore, it is
O hydrophilic
O hydrophobic
Amoeba sisters video recap Biomagnification
Biomagnification refers to the presence of higher concentration of chemical toxins as a result of the accumulation of toxins in organisms.
What is biomagnigication?Biomagnification is best explained as a condition in which the chemical concentration of a toxin is amplified in an organism compared to the environment in which the organism is found.
Biomagnification usually is observed as one goes higher in the trophic levels of organisms.
For example, chemical pollutant found in water may be present at tolerable levels. However, in organisms, living in the water, the concentration of the pollutant is higher as these organisms accumulate these toxins in their tissues.
Therefore, biomagnification refers to the accumulation of toxins in organisms higher than found in their environment.
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Which of the following is not a difference between photosynthesis and
cellular respiration?
A. Where they occur in cells
B. Being part of the carbon cycle
C. The products of the processes
D. The materials needed for the processes
Answer:
[tex]\boxed {\boxed {\sf B. \ Being \ part \ of \ the \ carbon \ cycle}}[/tex]
Explanation:
Photosynthesis and cellular respiration are both important processes to utilize energy and maintain life in an organism. There are many differences between the two, but we are asked to identify the answer that is not a difference.
A. Where they occur in cells
Photosynthesis occurs in chloroplasts in plants, algae, and some bacteria. Cellular respiration occurs in mitochondria in all organisms. This is a difference.
B. Part of the carbon cycle
The carbon cycle describes the exchange and movement of carbon throughout the Earth, atmosphere, and biosphere. Photosynthesis uses carbon dioxide and cellular respiration produces it, so they are both part of the carbon cycle. This is not a difference. This seems to be correct, but let's check the other choices.
C. The products of the processes
Photosynthesis produces oxygen and glucose, while cellular respiration makes carbon dioxide, water, and energy or ATP.
D. The materials needed for the processes
Photosynthesis needs carbon dioxide, water, and energy from the sun, while cellular respiration needs oxygen and glucose.
Both photosynthesis and cellular respiration are part of the carbon cycle, so the choice that is not a difference is Choice B.
Which of the three soil types will be best for vegetable farming?
1. loam
2. clay
3. silt loam
Answer:
Explanation:1
Lectins often bind their ligands via multiple weak interactions. bind their ligands with relatively low specificity. prevent viruses from binding to their target cells. are carbohydrates that bind to receptor proteins.
Answer:
The correct answer is - B.often bind their ligands via multiple weak interactions.
Explanation:
Lectins are specific types of proteins that identify and bind to specific carbohydrates present on the cell surfaces. They have an essential role in interactions and communication between various cells for identification and recognition.
Binding sites of lectins on the surface of one cell bind to the Carbohydrates on the surface of another cell. A lectin usually has two or more binding sites for carbohydrate units.
What is the classification of Ubiquitin Screening Services?
Creative Bioarray offers a wide range of cell-based ubiquitin drug target services, including deubiquitinating enzyme (DUB) profiling services, inducible degrader of LDLR (IDOL)-E3 ligase assays, custom HTS-compatible assays, and so on.
https://dda.creative-bioarray.com/ubiquitin-screening.html
Answer:
Creative Biogene is a leading company offering the best ubiquitin screening and profiling services. As a well-known expert in this field, our talented scientists provide support, expertise, experience, collaboration and customization to meet your specific demands. Creative Biogene is dedicated to offering a range of state-of-the-art ubiquitin assays services to support the rapidly growing academic and commercial drug discovery interests in this field.
1. An oral examination limits the practitioner to knowledge of what is seen clinically.
a. True
b. False
2. Dental radiographs allow the practitioner to see many conditions that are not apparent clinically.
a. True
b. False
Answer:
1. True.
2. True.
Explanation:
Diagnostic testing can be defined as a scientific process that typically involves identifying a condition or its cause through a series of procedures and examination.
In Medicine, a diagnostic test can be used to identify a disease (sickness) or cause of symptoms.
This ultimately implies that, a diagnostic test avails medical professionals or experts the opportunity to identify illnesses and underlying causes of symptoms.
1. True: an oral examination limits the ability of a medical professional or expert (practitioner) to have knowledge of what is seen clinically.
2. True: dental radiographs is an equipment which allow a medical professional or expert (practitioner) to see many conditions that are not apparent clinically.
Which of the following groups includes a protozoan that is transmitted sexually?
Chromalveolata
Excavata
Amoebazoa
Archaeplasteda
Rhizaria
Which of the following is a distinction between Ascomycetes and Basidiomycetes?
Ascomycetes form a sac around the sexual spores.
Ascomycetes have zygotes.
Ascomycetes release basidiospores.
Basidiomycetes form a shell around the sexual spores.
Basidiomycetes release conidiospores.
Which of the following is a specialized structure that would contain food ingested by phagocytosis?
Saprozoic
Cytostome
Cytoproct
Oral groove
Holozoic
Which part of a mushroom would be eaten?
Thallus
Sporangium
Mycelium
Septum
Hyphae
Answer:
Ascomycetes have zygotes
Mycelium
Explanation:
Ascomycetes have zygotes which is the main distinction between Ascomycetes and Basidiomycetes. Mycelium is a part of mushroom that is edible and can be eaten. Mycelium is the vegetative part of a fungus that consist of a mass of branching, thread-like hyphae. Hypha is a long, branching, filamentous body of mushroom as well as oomycete and actinobacteria. Hyphae are the primary mode of vegetative growth of fungi which is generally known as mycelium so mycelium is the edible part of mushroom.
What are the main structural supports for the vertebrae
Answer:
Intervertebral Discs
Explanation:
Between each vertebral body is a cushion; the intervertebral disc. Discs absorb stresses the body incurs during movement and prevents vertebrae from grinding against one another. The intervertebral discs are the largest structures in the body without a vascular supply
Answer:
The dorsal hollow nerve cord
Explanation:
The dorsal hollow nerve cord develops into the central nervous system;the brain and spine
In terms of the hierarchical scales of biological organization, __1__ are a very large scale, __2__ are a very small scale, and __3__ is between them.
Answer:
ecosystem, and biosphere
organelle and cells
tissues, organs, organ systems, organisms, populations, communities,
Explanation:
In terms of the hierarchical scales of biological organization, ecosystem, and biosphere are a very large scale, organelle and cells are a very small scale, and tissues, organs, organ systems, organisms, populations and communities, are present between them. The biological levels of organization of living things arranged from the simplest to most complex are organelle, cells, tissues, organs, organ systems, organisms, populations, communities, ecosystem, and biosphere.
White a paragraph comparing the organices in a to the organs in your body.
Answer:
An organ is a part of the body of a living organism perform a specific role in the body such as the stomach, the liver and many more. Organelles on other hand are like organs of the cells that are contained in the cytoplasm of cell these also have a certain specialized roles to play for the cell, and they all depend on each other. The example of the organelles are nucleus, mitochondria and many more.
* Organelles are structures inside the cytoplasm of cells
* Organs are amde up of tissues composed of group of specialized cells that, has a particular role in the body
Some of the largest mountains in the world, including the Himalayas, occur where
Select one:
a.
two oceanic plates diverge.
b.
two continental plates converge.
c.
an oceanic and a continental plate diverge.
d.
an oceanic and a continental plate converge.
Answer:
b. two continental plates converse
The development of DNA technology is bringing profound changes to science, agriculture and healthcare. Provide one example of a DNA technology and provide at least one advantage and one example of a concern or problem associated with its use.
Answer:
The CRISPR-Cas9 genome editing system can be used to edit genes and correct mutations associated with inherited diseases. However, this technology also has the potential to edit genes in germline cells in order to irreversibly modify the human species and the natural evolution of life
Explanation:
The CRISPR-Cas9 (Clustered regularly interspaced short palindromic repeats and CRISPR-associated protein 9) system is a natural prokaryotic defense system used by bacteria to defend against invading DNA. In the laboratory, the CRISPR-Cas9 system has been repurposed to create a versatile genome-editing tool that allows us to modify the genome of mammalian cells in a targeted fashion. The CRISPR-Cas9 is a simple gene-editing tool that consists of a single guide RNA (sgRNA) that guides the Cas9 enzyme to the exact genomic location where Cas9 needs to make a cut, which is then repaired by different DNA repair mechanisms. During DNA repair, nucleotides can be replaced and/or deleted, thereby producing desired genomic modifications. The CRISPR-Cas9 has an enormous potential to repair mutations in genes associated with inherited genetic disorders and cancer (i.e., oncogenes might be reversed in vivo by using this technology). However, the CRISPR-Cas9 genome editing system is also a subject of concern due to its dual use. For example, this technology can be used to modify the genome of germline cells by inducing mutations that can be passed across generations, thereby irreversibly modifying human DNA and altering the normal course of evolution.
Which of the following traits are characteristic of all mammals?
Mammals are air-breathing, warm-blooded, and have a backbone, yet these characteristics do not distinguish them from the rest of the animal kingdom. Mammals have the ability to regulate their body temperature using their metabolism and sweat glands in a way that no other animal can.
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Growers often wrap potted plants in plastic sleeves prior to shipping. If plants remain in these sleeves too long, their leaves curl and fall off. Imagine you are working at a garden center and have been asked to make a presentation to a local garden club. Unit 5 DQ Question: Explain the processes that may cause the leaves to drop and fall.
Answer:
Shock, age and climate.
Explanation:
The processes that may cause the leaves to drop and fall are shock, age and climate. The plants drop their leaves due to shock when they experience by transplanting from place to another. When the leaves get older having yellow colour so due to no function it falls. The climatic condition is also responsible for the dropping of leaves. Those plants which can't grow in cool season so when the winter comes they shed their leaves and wait for the summer season.
What is a community?
1 all the animals that live in a habitat
2 a single species that lives in a habitat
3 all the species that live in a habitat
4 a population that lives in a single habitat
Answer:
3. All the species that live in a habitat.
A community is where all the species live in a habitat. Hence the correct option is 1.
A community is an ecological term that encompasses all the different species of organisms that coexist and interact within a specific habitat or geographic area. It includes plants, animals, fungi, and microorganisms that share the same environment and form intricate ecological relationships with each other.
These relationships can be competitive, predatory, symbiotic, or other forms of interactions that influence the dynamics and structure of the community. Understanding the composition and interactions within a community is vital in studying the biodiversity, ecosystem functioning, and overall health of a given habitat.
Hence the correct option is 1.
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What is an ecosystem?
Answer:
An ecosystem is a geographic area where plants, animals, and other organisms, as well as weather and landscape, work together to form a bubble of life. Ecosystems contain biotic or living, parts, as well as abiotic factors, or nonliving parts. ... Ecosystems can be very large or very small.
Explanation:
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How does energy acquisition in the deep sea differ from energy acquisition near the ocean’s surface?
a.
Organisms in the deep sea acquire energy directly from the sun.
b.
Organisms near the ocean’s surface rely on chemosynthesis rather than photosynthesis.
c.
Organisms in the deep sea do not have direct access to sunlight.
d.
Organisms in the deep sea have no means to obtain energy unless they travel to the ocean’s surface.
Answer:
Organisms in the deep sea acquire energy directly from the sun.
A characteristic is a feature that helps to identify something. How would you describe a characteristic of a good movie or book?
The following offspring were observed from many crossings of the same pea plants. What genotypes were the parents?
465 purple axial flowers
152 purple terminal flowers
140 white axial flowers
53 white terminal flowers
a) PpAa x PpAA
b) PpAa x PpAa
c) PpAa x ppAA
d) PPAA x ppaa
e) PPaa x ppAA
Answer:
a
Explanation: the genotype is the same
Cross between same pea plants for many generations having genotype PpAa x PpAa because after crossing over parents character having a large number of phenotype in offspring, hence a is the correct option.
What is a genotype?The term "genotype" ranges to an organism's genetic makeup, in other words, it describes an organism's whole gene. The term can also be used to refer to the alleles, or variant forms of a gene, that an organism carries in a more specific meaning.
When crossing of particular traits having genotype PpAa x PpAa because after crossing over parents' character having a large number of phenotypes in offspring.
The genotype of a person is their own DNA sequence. More specifically, the two alleles a person inherited for a particular gene are referred to using this term.
Therefore genotype parents PpAa x PpAa offspring have a large number of traits the same as parents and a low number of new traits.
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The most intense earthquakes happen at
1. Plate boundaries
2.subduction zones
3.mid - ocean ridges
4. Collision plate boundaries
Answer:
The answer is #2. Subduction Zones
What is the chain of custody?
A) the order of who gets custody of the crime scene
B) the paper trail of every person that has been in contact with the evidence throughout its seizure, collection, preservation, analysis and
disposition
C) the order of suspects
D) the people who have custody of children until the case is closed
an organism that uses oxygen to break down food to obtain energy
Explain in detail what caused the population of peppered moths to change from mostly light-colored variations to mostly dark-colored variations in the 1800s. Explain how the peppered moth mutation is an example of natural selection. Explain what would happen to the populations of both variations of peppered moth once the pollution disappeared. Determine which variation of the peppered moth would be more successful in your neighborhood, and explain in detail your reasoning supporting your conclusion. Predict what may happen to the population of peppered moths if they were relocated to a lush, green rainforest ecosystem. How would this impact natural selection and their struggle to survive?
Answer:
Natural selection caused the population of peppered moths to change from mostly light-colored variations to mostly dark-colored variations in the 1800s. Pepper colored moths camouflaged among trees but after industrial revolution the couldn't because of soot, which camouflaged black moths; hence, they were preyed upon more.
