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Over time, changes in a population's gene frequency can lead to reproductive isolation, because it could propitiate a
Identify the hormone represented by each letter, in this case, the letter A represents the thyroid glands and letter B represents the parathyroid gland.
<h3>What does the thyroid do?</h3>
The thyroid is a butterfly-shaped gland that is located in the anterior part of the neck, hugging the windpipe. The hormones produced by it act on our body and metabolism from our fetal formation to senility.
<h3>What is the function of the parathyroid?</h3>
The parathyroids are four glands located in the neck, behind the thyroid, whose function is to control the levels of calcium in the blood through the production of parathyroid hormone (PTH).
These two organs have essential functions for the human body responsible for metabolism.
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The fertilized cell that results is referred to as a zygote. A zygote is diploid cell, which means that it has twice the number of chromosomes as a gamete
It is found in a non coding regulatory region (a "switch") upstream of the lactase gene.
The primary carbohydrate in milk, lactose, is an important source of energy for most young mammals.
Lactase is the enzyme that hydrolyzes lactose into glucose and galactose (or lactase-phlorizin-hydrolase, LPH). Since milk is a necessary part of young mammals' diets and since mammals cannot utilise lactose without this enzyme, lactase activity is crucial to the early development of most mammals.
Although the methods and evolutionary justifications for this downregulation are not well understood, lactase synthesis often falls once the weaning period is over. However, some people continue to produce lactase far into adulthood and can metabolize the lactose in fresh milk. This quality is known as LP (Lactase persistence).
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