They are organic 3
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3 point
The United States experienced a rapid growth of its population in the early 1900s. Which of the following factors did not contribute to this rapid population growth?
Immigration was greater than emigration.
More people moved from farms to large cities.
Advances in technology led to cleaner food and water supplies
The birth rate was higher than the death rate.

answer: - b cells

explanation: -

so, the b cells mediate their action by identifying the antigens present on the surface of the pathogens and then producing antibodies in return to mediate its effect.

the corpus luteum secretes estrogens and progesterone. the latter hormone causes changes in the uterus that make it more suitable for implantation of the fertilized ovum and the nourishment of the embryo. if the egg is not fertilized, the corpus luteum becomes inactive after 10–14 days, and menstruation occurs.

i hope this : )

the three components of a nucleotide are the nitrogenous base, the phosphate group and the five-carbon sugar.

c is the answer to this question. altitude affects the weather because air molecules evaporate.