Thalamus and Prefontal cortex (PFC)
<span>Thalamus is known to be a
small region that is found at the center of the brain and function by relaying
signals to the eyes, mouth of the brain and function by relaying signals from
the eyes, skin, mouth and ears to the other part of the brain for processing.
However, prefontal cortex is the region of the brain that is involved in
planning complex cognitive behavior, decision making and personality
expression. Also, prefontal cortex are considered to be involved in thought
orchestration and support concrete rule learning.</span>
Answer:
Option A
Explanation:
Options
A. most populations were fixed for a single genotype, but genotypes varied among populations
B. average heterozygosity was declining steadily over time
C. individual populations were polymorphic for several loci and most populations were genetically similar to one another
D. all populations were fixed for the same allele at each locus studied
Solution
As per the study conducted by Templeton, it was found that human affect the biodiversity at all biological levels such as genetic, ecosystem, species etc. and behind genetic variation two important factors are genetic drift and gene flow.
Both the gene flow and genetic drift produce opposite results as genetic drift increase variation with in the species but decrease variation with in the local population and the opposite of this happens in gene flow.
Genetic drift has actually lead to speciation of collared lizards among themselves for a specific genotype
Hence, option A is correct
Biodiversity completely depends on the ecosystem. The <u>increase in biodiversity also leads to an increase in ecosystem stability.
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Further Explanation:
Biodiversity is the term used for <u>describing the variety of species found on earth.</u> It can be animals, plants, microorganisms (bacteria and fungi), etc. the earth is rich in biodiversity; there are so many species that have to be discovered, whereas there are several species that have extinct. The entire living organism forms the ecosystem. It also includes <u>their physical environment and the interpersonal relationship with them.
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<u>Species play a crucial role in the ecosystem.</u> So the extinction or loss of particular species affects the perfect balance of the ecosystem. The <u>ecosystem work in a cycle that means plants absorb the energy from the sun and produce food through the process called </u><u>photosynthesis</u><u>.</u> The plant produced food is called the primary production, which is utilized by the myriad animals. The rate of <u>primary production completely depends on the global food supply.</u> It also increases the rate of climate change. The plants produce carbon dioxide at night time and remove it in the atmosphere. That decreases the variability of the environment and disturbs its original state.
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Answer Details:
Grade: High School
Subjects: Biology
Topic: Biodiversity
Keywords:
Biodiversity, ecosystem, species, animal, plant, microorganism, environment, extinction, photosynthesis, primary, myriad, global, variability, carbon dioxide.
the answer is B plenty of sunlights
Gametes with two heterozygous copies of a chromosome may result from nondisjunction in either meiotic division.
<h3>What three types of nondisjunction are there?</h3>
Nondisjunction can take one of three different forms: failing to separate a homologous pair of chromosomes during meiosis I; failing to separate sister chromatids during meiosis II; or failing to separate sister chromatids during mitosis.
<h3>How can you tell whether nondisjunction takes place in meiosis 1 or 2?</h3>
- Nondisjunction, which can lead to an aberrant amount of chromosome-bearing gametes, can happen during meiosis I and meiosis II.
- The primary distinction between nondisjunction in meiosis 1 and 2 is that whereas sister chromatids fail to separate in meiosis II, homologous chromosomes fail to separate during meiosis 1.
<h3>What are mitotic and meiotic divisions?</h3>
- Mitosis and meiosis are the two distinct processes of cell division.
- When people talk about "cell division," they typically mean mitosis, which is the process of creating new cells for the body.
- The cell division process known as meiosis is what produces egg and sperm cells. A vital process for life is mitosis.
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