A person infected with human immunodeficiency virus (HIV) may not have any symptoms for a period of time. During this period the virus affects the body by doing which of the following?
A) The virus changes the identity of the nucleotides of immune cells to prevent the immune system from function normally.
B) The virus damages immune cells while using their machinery to produce copies of itself.
C) The virus uses nutrients meant for immune cells to fuel its own cellular respiration.
D) The virus produces toxins that weaken the immune cells and prevent them from reproducing.

Read the following scenario to answer the following question. in some zoos, rare crosses between a male lion and a female tiger have produced hybrid offspring called "ligers." male ligers are sterile but some female ligers are fertile. in the wild, lion and tiger ranges do not naturally overlap, making such a cross unlikely. furthermore, the solitary behavior of tigers and the social organizations of lions create behavioral differences. applying the biological species concept, the sterility of ligers reveals that a. lions are probably a subspecies of tigers b. tigers and lions are the same species c. a new species called "ligers" is forming d. tigers and lions are separate species

In the ocean why are the greatest amount of primary producers found in the epipelagic zone and how does that affect biodiversity

All ova contain sex chromosomes corresponding to: x y xx xy