Explain why both the ovarian cycle and uterine cycle are necessary for fertilization to occur? Please help me

Explain how ancient whale fossils found in eqypt are believed to support the theory of evolution.

An ecologist studied the same species of deer during the summer and the winter. she noticed that during the summer, when there was plenty of food, the deer were energetic and playful. however, during winter when food was scarce, the deer moved more slowly and did not run unless they needed to escape a predator. which scientific fact is best supported by her observations?

Which worm has eyespots that are used to detect light? a fluke b marine worm c planarian d tapeworm