"maintaining a steady state internal environment, despite a changing external environment, is called ________"

1 answer:

Rudiy273 years ago

3 0

"maintaining a steady state internal environment, despite a changing external environment, is called homeostasis"

Homeostasis is any self-regulating process by which biological systems tend to maintain internal stability with the tendency to resist external changes. Homeostasis involves negative and positive feedback loops. Homeostasis depends on the ability of the body to detect (via sensors) and oppose these changes. From sensors signals are sent to the control center in the brain, and then after processing the information the effectors are activated.

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Answer:

B) 2pq

Explanation:

Hardy-Weinberg equilibrium refers to a model which explains the effect of evolution on the gene pool.

The model is based on the assumptions that if no evolutionary force like genetic drift, natural selection and many other will act on the population and therefore the gene pool (gene frequency and the genotypic frequency) of a populations remains in equilibrium or constant throughout the generations.

The genotypic frequency in the model is calculated by

P² = genotype of a homozygous dominant trait

q² = genotype of a homozygous recessive trait

2pq = genotype of heterozygous trait.

Thus, P²+2pq+q²=1

In the given question, since the population is in equilibrium that is no evolutionary force is acting, therefore, the genotype frequency remains the same that is the frequency of Aa will remain same that is 2pq even after 100 generations.

Thus, Option-B is the correct answer.

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