During which phase of mitosis do the centrioles begin to move to opposite poles

An organism has 12 chromosomes in its germinal cells. During spermatogenesis, which of the following cells is the first to have 6 chromosomes? A. primary spermatoctes B. secondary spermatocytes C. spermatids

What is most likely a product of an early gene?

How is hydrogen different from all the other elements?

Which set of traits best characterizes the amphibian class? Select one: a. tetrapod, gills, moist skin, scales b. tetrapod, lungs, moist skin, scales c. tetrapod, gills, lungs, scales d. tetrapod, gills, lungs, moist skin

A farmer sprays insecticide on his crops to kill unwanteed insects. Most of the insects die, and the chemicals have the effect of damaging the DNA of the insects that are not killed.

How is gamete formation like tossing a coin?

Predict which of the three treatments will have the most and the fewest strawberry poison dart frogs, assuming that leaf litter is important for maintaining healthy populations of frogs.

Sperm and eggs are types of sex cells called

5) Larry goes to the doctor complaining that he can't see the right side of the visual field with either eye. Where in the visual signal-processing pathway is the problem?

The theory of divergent evolution adaptive radiation coevolution convergent evolution suggests that all the mammals alive today came from the same common ancestor.