Which of the following is responsible for the deepening of the voice in males?
a. estrogen and progesterone
b. primary sex characteristics
c. reproduction
d. testosterone

What does the hardy-weinberg principle relate to? a. chances of survival of an organism b. frequency of alleles in a population c. natural selection in a species d. causes of evolution among organisms

What would most likely happen to a unicellular organism if it was exposed to a hypotonic solution for an extended period of time?

There are only about 250,000 known fossil species. true or false