An actin gene in humans is 92% identical to the homologous gene in mice. An actin gene in humans is 80% identica to the homologous gene in yeast. What does this say about how long ago these organisms had a common ancestor?

answer; i believe that the correct answer is; ///bodies of water store heat during the day and release it at night;

the answer to your question is sperm

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 : )