Which of the stages of spermatogenesis is responsible for mitotic division of spermatogonia and takes place in the basal compartment?

Which stage of spermatogenesis is described by spermatogonia that undergo multiple rounds of mitosis?  

A producer tests their bulls on June 1st and are told there is a sperm abnormality rate of 45% in one of the semen samples.  Should the producer use that bull and why?  

Heat stress can cause infertility in males by killing sperm.

What muscle/s help with muscle contraction during ejaculation?

When no further sexual behavior can be induced, even with enough stimulation is called exhaustion.

Provide an example of how each of the following factors affects onset of puberty in livestock.  Age: Nutrition: Social cues: Environment (season):

Which is NOT true about the electroejaculation process? 

What organ is location within the olfactory system that helps detect pheromones? 

Which of the following is not a limitation to semen sex sorting?