Which characteristic of the male reproductive system is not variable among animal species that reproduce sexually? a. presence of a scrotum. b. shape of genitalia. c. composition of accessory fluids. d. presence of genitalia.

Is snow a type of precipitation? explain why or why not.

This is the amino acid cysteine. circle the amine group, put a box aroundthe carboxylic acid group and use a different colored pencil/pen to circle the sidechain (r group). h o | ||nh2— c- c-oh | ch2 | sh

Which of the following describes a boom period? a. as one population increases, another population decreases. b. as one population increases, the other population also increases. c. as one population decreases, another population increases. d. as one population decreases, another population also decreases