Answer:
The correct answer is - production.
Explanation:
If a cow does not milk on schedule it creates stress conditions and leads to several physiological changes which lead to the release of a hormone. This hormone result in lower milk production also affects negatively on her immunity.
The stress cause release of estrogen, and prolactin hormones with other corticosterioids that result in decreases in the number of cytokines and decrease innate immunity of the cow.
The best and most correct answer among the choices provided by your question is the second choice or letter B.
Crossing over occurs during meiosis when chromosomes overlap and sections of each chromosome switch places in prophase II.
Baccteria has evolved from some forms of plankton so I guess that could be a valid answer.
Answer:
homologous structures adapted to different purposes as the result of descent with modification from a common ancestor