how does gene flow affect population's genetic variation
Answer:
increase the genetic variation of the population
Explanation:
hope this helps
During _____, the homologous chromosome pairs independently align themselves at the equator of the cell.
Answer:
Prophase I
Explanation:
During prophase I, homologous chromosomes pair up and exchange sections of DNA.
During prophase I, the homologous chromosome pairs independently align themselves at the equator of the cell.
What happens in prophase I?DNA replication precedes the start of meiosis I. During prophase I, homologous chromosomes pair and form synapses, a step unique to meiosis. The paired chromosomes are called bivalents, and the formation of chiasmata caused by genetic recombination becomes apparent.
Moreover, during prophase I, the complex of DNA and protein known as chromatin condenses to form chromosomes. The pairs of replicated chromosomes are known as sister chromatids, and they remain joined at a central point called the centromere.
Therefore, during prophase, the chromosomes in a cell's nucleus condense to the point that they can be viewed using a light microscope. Prophase is the first phase of mitosis. During this phase, the chromosomes inside the cell's nucleus condense and form tight structures.
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Which type of circulatory system is most likely present in organisms with a circulating body fluid that is distinct from the fluid that directly surrounds the body's cells?
A closed circulatory system is present in organisms with a circulating body fluid that is distinct from the fluid that directly surrounds the body's cells.
What is the circulatory system?
The circulatory system is an organs system that works to carry out blood cells to all cells in the body.
The circulatory system is fundamental for transporting oxygen and nutrients to all cells of the body.
A closed circulatory system is a special organ system where the blood cells are not circulating in body cavities.
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The type of circulatory system is most likely present in organisms with a circulating body fluid that is distinct from the fluid that directly surrounds the body's cells is closed circulatory system.
What are the types of circulatory system ?
Almost all multicellular organisms want a circulatory system to move oxygen and vitamins thru the body. Evolution has brought about the lifestyles of styles of circulatory structures namely: open circulatory system and closed circulatory system.
Closed circulatory system is located in vertebrates and some invertebrates like earthworms. This system has vessels that behavior blood at some point of the body.: is located in vertebrates and some invertebrates like earthworms. Blood and interstitial fluid are distinct and it has the nlood flowing inside the capillary.
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Which fields would most likely make use of spectroscopy techniques? select 4 options. food production medical research scientific research space research weather forecasting
Spectroscopy refers to the study of color from visible lights to all bands of electromagnetic spectrum. It can be used in fields including medical research and scientific research.
What is spectroscopy?Spectroscopy is done for studying structure of atoms and molecules. It is done by emitting large numbers of wavelength, to make the structure visible.
Scientist use this technique to calculate relative velocities of supernova and galaxies. in medical field it is proven effective to fight cancer.
Thus, options b and c are correct.
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The cold adapted coniferous trees that dominate here have the following key adaptations: (select all that apply) question 7 options: conical shape to helps the snow to distribute more evenly across the tree and also to fall to the ground and prevent branches from breaking pear shape to helps the snow to distribute more evenly across the tree and also to fall to the ground and prevent branches from breaking thin needles have less surface area and waxy cuticles to avoid water loss in the dry winds and in winter when most available water is frozen thick needles have less surface area and waxy cuticles to avoid water loss in the dry winds and in winter when most available water is frozen very shallow roots compared to other trees like we have here in ohio. very deep roots compared to other trees like we have here in ohio.
Conical shape helps the snow to distribute more evenly across the tree and also to fall the ground and prevent branches from breaking pear shape to helps the snow to distribute more evenly across the tree
and ,also to fall to the ground and prevent branches from breaking thin needles have less surface area.
How do conifers adapt to the cold?They have several adaptations that help them grow in colder, drier conditions. Their needles are heavily cutinized. Their small surface area helps reduce evaporative water loss.
Thus, thee are the correct statement.
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Which of the following describes Aristotle's method of classifying organisms?
a. Aristotle categorized organisms as either plant or animal.
b. Aristotle created a hierarchy of life based on complexity.
c. Aristotle cataloged only animals and divided them into carnivores and herbivores.
d. Aristotle classified organisms based on geographic location.
Answer:
Aristotle created a hierarchy of life based on complexity.
this is the right answer unlike the other one
Ap biology evolution why do some organisms evolve away organs
In what two ways did an understanding of geology influence darwin
Answer: Geology played a major role in Darwin's life and scientific work: The formation of volcanoes, the slow subsidence of coral reefs, the rising of the Andes by earthquakes, the fossil relatives to modern species in South America,
Explanation:
Naomi runs a computer simulation for a population of mice in a meadow ecosystem. The simulation begins with 100 mice, divided equally among brown and white variants. The variants are similar apart from their body color. A mating of a white and brown mouse may produce a speckled mouse, which is mostly brown with some white markings. The table shows the numbers of each mouse variant over 7 reproduction cycles. Only adult mice are reported in the table.
Which of these events did the computer MOST LIKELY include in its simulation?
A. After cycle 2, a disease arrived that affected white mice only.
B. After cycle 2, a predator arrived that saw white mice more easily than brown mice.
C. After cycle 4, brown mice and white mice began living separately, and stopped interbreeding.
D. After cycle 4, a predator arrived that saw white mice more easily than brown mice.
E. After cycle 4, a disease arrived that affected brown mice only.
After cycle 4, a disease arrived that affected brown mice only was most likely included in its simulation.
What is Disease?This is defined as any harmful deviation from the normal structural or functional state of an organism.
This usually leads to death and the table shows a steady decline from cycle 4 which means a disease most likely arrived which affected brown mice only.
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The term used for all floating and drifting organisms in the sea is:
Answer:
The answer is Plankton
Explanation:
A collection of tiny organisms living beneath the surface of lakes, rivers, ponds, and oceans across the planet are called plankton.The term Plankton is used for floating and drifting organisms in the sea.
What are plankton?Planktons are organisms found in water that cannot float against the water current.
The word plankton is derived from Greek which means to drift and float.
Thus, the term used for all floating and drifting organisms in the sea is plankton.
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What would happen if a disease has spread among lily pads in a pond ecosystem ?
Answer:
small fish that rely on lily pads for protection will decrease in population.
how many types of reproduction
Answer:
Sèxual and aséxual reproduction.
Explanation:
Depending upon the formation or non-formation of gamets, reproduction is of two types sèxual and aséxual reproduction.
-TheUnknownScientist 72
A mother has hemophilia, and the father is unaffected. What is the probability that their son will have hemophilia? Their daughter?
Answer:
A 25% (one in four) chance of having a son with hemophilia. A 25% chance of having a son with normal blood clotting. A 25% chance of having a daughter who is a carrier. A 25% chance of having a daughter who has hemophilia.
Explanation:
In the extremely rare event that both the mother and the father have the affected X chromosomes then there is a 50% chance that their sons will be born with hemophilia. There will be a 50% chance their daughters will be carriers and a 50% chance they will also have the condition.
27.
Scientists believe that Earth's early atmosphere
changed in composition as a result of
A. the appearance of oxygen-producing organisms
B.
the drifting of the continents
C.
the changes in Earth's magnetic field
D.
a transfer of gases from the Sun
Answer:
The answer is A
Explanation:
The appearance of oxygen-producing organisms.
The appearance of free oxygen in Earth's atmosphere led to the Great Oxidation Event. This was triggered by cyanobacteria producing oxygen that was used by multicellular forms as early as 2.3 billion years ago.What are cyanobacteria?Cyanobacteria are aquatic and photosynthetic, that is, they live in the water, and can manufacture their own food. Because they are bacteria, they are quite small and usually unicellular, though they often grow in colonies large enough to see.Cyanobacteria are responsible for the Earth's transition from a carbon dioxide-rich atmosphere to the present relatively oxygen rich atmosphere as a consequence of oxygenic photosynthesis.To know more about multicellular here
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Based on the diagram, what would happen if Earth had no atmosphere?
Diagram of greenhouse effect showing the sun, atmosphere, and human activities that release greenhouse gases. The diagram shows that sunlight is reflected back to space by the atmosphere, absorbed at the surface, and reflected by the surface. Greenhouse gases trap heat from the sun. Examples of human activities include CFCs and haloalkane from refrigerators and aerosols, nitrous oxide from gasoline and agriculture, methane from cattle and fertilizer, and carbon dioxide from oil and coal.
Human activities would not release greenhouse gases.
Greenhouse gases would not trap heat from the sun.
Sunlight would not be absorbed at the surface.
Surface temperatures would be maintained.
Based on the diagram, we can confirm that if Earth had no atmosphere, Greenhouse gases would not trap heat from the sun.
Why would these gases not trap heat from the sun without the atmosphere?Greenhouse gases are located in the atmosphere, therefore, without it, they would not be able to trap the heat from the sun. Although high concentrations of these gases are a modern problem in global warming, these gases are a natural part of the earth and are necessary to maintain livable temperatures at the surface of the earth.
Therefore, we can confirm that if Earth had no atmosphere, Greenhouse gases would not trap heat from the sun.
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Answer:
Greenhouse gases would not trap heat from the sun.
Got it right. Have a great day!
What are the two divsions of the peripheral nervous system?
Answer:
The answer will be somatic nervous system and autonomic nervous system.
Explanation:
Nervous system contain many interconnecting nerves that helps brain to respond according to stimuli. The nervous system is divided into central and peripheral nervous system. Peripheral nervous system again divided into the somatic nervous system and the autonomic nervous system.
What is nervous system?The peripheral nervous system consists of nerves that comes out from brain and spinal cord.
These nerves helps to form a network for communication between central nervous system.
Peripheral nervous system is divided into:
Autonomic nervous system: It is visceral efferent system as it sends motor impulse to visceral organs.Somatic nervous system: It contain sensory and motor neurons that sends and receive sensory information from motor neurons.Thus, there are two divisions of peripheral nervous system, these are autonomic and somatic nervous system.
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These are not in order, Can u please put them In order
Answer:
3 / 4 / 5 / 2/ 1
Explanation:
Hope this helps.
5which of the following
does not describe
the structue of DNA
Answer:
C. contains adenine-guanine pairs
Explanation:
An organism with the GG genotype would be
Answer:
Hom ozygous
Explanation:
organisms that have the same genotypes are Hom ozygous, while organism that have different genotypes (Gg) are Heterozygous
Protozoa are often found in what kind of environment?.
What is the period of time that elapses between the generation.
Answer: should be:
The latent period.
Explanation:
:)
what energy does burning a match put off
18 The size of a mouse population in a natural
ecosystem tends to remain relatively constant due to
A. the cycling of energy.
B. the lack of natural predators.
C. the increased numbers of decomposers.
D. the carrying capacity of the environment.
Answer:
D- the carrying capacity of the environment.
Explanation:
The limiting factors also called as the carrying capacity of the environment keeps the size of a mouse population in a natural ecosystem constant. Therefore, option (D) is correct.
What is a limiting factor in a ecosystem?Limiting factors are physical, biological, and ecological conditions that:
(1) Limit the ecosystem's ability to sustain native plant and animal populations and to accommodate natural disturbances like floods;
(2) Limit the quality or availability of habitat that supports all life stages of native species; and
(3) Limit the ecosystem's ability to sustain the local tribal culture.
The only natural factor limiting the number of mice in the home is a scarcity of resources such as food. Therefore, The limiting factors also called as the carrying capacity of the environment keeps the size of a mouse population in a natural ecosystem constant.
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Which word helps clarify the meaning of the word invertebrates?
Answer:
Animal
Explanation:
Educated guess and got it right
Invertebrates are the classification of the Animalia that have species with no backbones. Animals are the word that clarifies the meaning of invertebrates. Thus, option D is correct.
What are Invertebrates?
Invertebrates are animals that lack a backbone or a vertebral column, unlike vertebrates. They are best described by animals as they are precisely their characteristic and is not seen in plants or other species. They are cold-blooded that include echinoderms, mollusks, arthropods, etc.
Therefore, animals clarify the meaning of invertebrates.
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The complete question is attached to the image below.
HELPPP I AM STUCK WITH THIS PROBLEM !
Answer:
All red boxes should be filled with Hh.
Explanation:
The genotype should 100% be Hh, due to the dominant (H) existing in all boxes (which represents the possibilities of the likelihood of inheriting a family trait). This means the likelihood of inheriting 2 horns is 100%.
Which is the best explanation for how earthquakes cause tsunamis?.
Answer:
Tsunamis are caused by violent seafloor movement associated with earthquakes, landslides, lava entering the sea, seamount collapse, or meteorite impact. The most common cause is earthquakes. See the percentages on the right for the geological events that cause tsunamis. Note that 72% of tsunamis are generated by earthquakes. A disturbance that displaces a large water mass from its equilibrium position can cause a tsunami.
Explanation: Hope this helps :]
ATP is a nucleotide which stores energy, true or false
Answer:
False
Explanation:
How does the mutation rate affect the speed at which a population adapts to its environment?
Answer:
Under these conditions an increase in the mutation rate evolves, which allows faster adaptation to the spatial variation in local temperature, causing a faster range expansion across the spatial gradient.
Answer:
The mutation rate is the speed (or mutations per unit time) at which a sequence of DNA changes, either through natural means or artificially induced means. Natural selection is the way that a population of organisms evolve over time to adapt to their environment.
The minerals hematite and magnetite are sources of
a iron
b. lead.
C. Zinc
d. copper
Under what circumstances would a food pyramid be a more useful model than a food chain?
Answer:
A food chain represents the linear relationship between organisms for food. On the other hand, a food pyramid represents the optimal number of servings to be eaten each day from each of the basic food groups.
Food pyramid represents the total number of food to be eaten each day from each of the basic food groups .A food chain represents the linear relationship between organisms for food.
What is food chain?
Food chain is a linear sequence of organisms through which nutrients and energy pass as one organism eats another.
What is food pyramid?Food pyramid is a depiction of the optimal number of servings to be eaten each day from each of the basic food groups.
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