Which statement is true of succession? A. Succession happens all the time, and sometimes we can see it.
B. Succession happens rarely, and scientists can sometimes measure it.
C. Succession happens sometimes, and scientists can rarely measure it.
D. Succession happens occasionally, and we can always see it.

A. Succession happens all the time, and sometimes we can see it.

Explanation:

Succession is a usually predictable and sequential series of changes to a community that occurs over time. The exceptions to this predictability include climate change or an invasive species causing the succession.

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 : )

this age may represent the age of the earth's accretion, of core formation, or of the material from which the earth formed. this dating is based on evidence from radiometric age-dating of meteorite material and is consistent with the radiometric ages of the oldest-known terrestrial and lunar samples.