Out of the following given choices;
A. major changes in the structure of Earth's layers
B. major changes that occur in the solar system
C. major changes that are recorded in the fossil record
D. major changes in the
<span> arr</span>angement
of the continents
The answer is C.
Changes in the environment in prehistoric times can be best exhibited by the evolutionary
changes of living organisms. This is best shown
by fossil records. Changes in geological times are characterized by a high rate of varying individuals of a species
and with high extinction rates.
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.
