Which causes a drop in female hormone levels?
A. the onset of the menstrual flow
B. if an egg is released from the ovary
C. if the uterine wall thickens
D. if the egg is not fertilized

One statements is an example of a scientific observation. another statement is an example of a scientific explanation. identify the correct statement for each category to illustrate how scientific explanations are inferred from scientific observations.

What noticeable trend from this graph might be used to make a conclusion?

Explain the significance of the increased cell specialization of the volvocine line