Scientists studying a population of fruit flies observe that a small percentage of the population mates in the morning while the rest of the population mates at night. Scientists predict that, over
time, the population that mates in the morning and the population that mates at night will become
different species.
Which of the following best supports the scientists' prediction that speciation will occur in the fruit
fly population?

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 : )

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instead of copying and pasting things off of tests or work done on computer which im sure you did, try and read over the question carefully