`1.true or false? gametogenesis is the same as meiosis?
2.name two types of gametogenesis and how they are different from each other.
3.why is it important that only one viable egg cell is produced during meiosis in females?

How does human environment effect the biosphere

Which of the following statements is true about the relationship between genetic variation and natural selection? a. genetic variation must be present in a population before natural selection can act on it. b. genetic variation arises in a population as a result of natural selection. c. natural selection can act on a population whether there is genetic variation within the population or not. d. after natural selection acts on a population, the amount of genetic variation in the population always increases.

Adistinctive characteristic of mammals that is not observed in other vertebrates is