Some rattlesnakes in a population have markings that help the snakes hide. The snakes with these markings catch more prey, live longer, and have more offspring that the other snakes. What does the theory of natural selection predict about this population? A. over time, it will become extinct
B. over time, more members will have useful markings
C. it will not change over time
D. over time, fewer members will have useful markings

I'm sure the correct answer is B. over time, more members will have useful markings.

Explanation:

If these markings are a chosen trait in the snakes offspring, the number of snakes with these markings will grow.

However, if the trait is not a dominant one then it is less likely to show up in offspring and could be at risk of going extinct.

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 : )