Answer:
At the beginning of the follicular phase, the lining of the uterus (endometrium) is thick with fluids and nutrients designed to nourish an embryo. If no egg has been fertilized, estrogen and progesterone levels are low. As a result, the top layers of the endometrium are shed, and menstrual bleeding occurs.
Answer:
C) none of the species would survive
Explanation:
clam only goes down to a pH of 4.5
Answer:
they tend to overlook details
Answer:
it is known as big bang reproduction