There are a variety of lymphocytes involved in the adaptive response, each with a specific function. One of the subsets of cells essential in the adaptive response is T helper cells. Choose the answer that most accurately describes the role of T helper cells in mounting the antibody response.

a. T helper cells present antigens to B cells, which is required for their activation.
b. T helper cells aid in the response by killing infected cells while the antibody response mounts.
c. T helper cells aid the antibody response by binding to the B cell MHCII/protein complex and secreting cytokines like IL-4.
d. T helper cells secrete IL-2, which is required for clonal expansion of B cells.

well, that's easy; the answer's c, "it reduces contamination of the water and substrate of the estuary."

plato users

given bodies of water

pacific / arctic / indian / southern

[ a ] the caribbean sea

[ b ] the northern ocean

[ c ] the atlantic ocean

[ d ] the barents sea

with this being the given answers

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 : )

i'm guessing this is from edg enuity so the answers would be, from top to bottom,

theodor schwann

matthias schleiden

robert hooke

rudolph virchow

anton van leeuwenhoek