Which of the following which of the following organism would be in the first trophic level?
a caterpillar
b mouse
C bee
d maple tree

D

Explanation:

The first trophic level is the producer, which makes its own food, so it has to be a plant / algae / cyanobacteria

the answer is d (apex) good luck : ))

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 : )