Why is it possible for an observer on earth to see the phases of the moon? a. the moon revolves around the sun, b. the earth revolves around the sun, c. the earth rotates on its axis, or d. the moon revolves around the earth

Why is it important to reduce the number of chromosomes in half when forming gametes for sexual reproduction?

Even though the ostrich is a flightless bird, ostriches still possess wings that stretch approximately two meters across when fully extended. scientists speculate that when dinosaurs became extinct, some of the birds that lived during that time became land dwellers since they were able to consume the food that the dinosaurs once ate. over time, these species grew larger and heavier. eventually, the ostrich species became too big to fly. the wings found on ostriches are known as a. analogous structures. b. homologous structures. c. vestigial structures. d. symmetrical structures.

How are mitosis and meiosis similar?