Answer:
B. Estrogen binds to specific receptors inside many kinds of cells, each of which have different responses to its binding.
Explanation:
Estrogen is a lipid-soluble steroid hormone and binds to its receptors present inside the target cells. Estrogen binds to specific receptors in different types of cells. Binding of estrogen to a specific receptor in a cell would initiate the specific cellular response. Likewise, binding of estrogen to its receptors in some other cell type would generate a different cellular response. For example, binding of estrogen to transcription factors in the cells of mammary glands may stimulate cell division and differentiation to trigger the development of mammary glands at puberty in females.
In plants, a new cell wall is fashioned between the new daughter cells. In animal cells, the cell membrane constricts to pinch the parent cell into daughter cells.
The correct answer is letter A. Enzymes assure that digestion occurs within hours instead of days. These chemicals release fast acting agents that digest food and turn it into usable energy within the body. Without these enzymes digestion would occur at a very slow pace and the body will become weak because of the lack of nutrient absorption.
A kestrel, because a consumer is defined as an animal that eats other animals in a food chain (kestrels are the only organism here that consume other animals)