Which one of the following steps would be included in the primary response in humoral immunity?
a. antigen binds to antibodies
b. cytotoxic t cells bind to infected body cells and destroy them
c. t cells activate cytotoxic t cells
d. a macrophage consumes a virus and displays antigens on its surface and signals t cells to divide.

the answer is c most of the fortnite players usually buy v bucks to get the battle pass and other cosmetics but some players who are referred to as "no skins" don't   buy skins and are usually noobs.

the correct answer is: b. pantala flavescens, because these organisms would have a high level of genetic variation due to sexual reproduction.  

because involves two organisms (parents) whose genetic material combines, sexual reproduction leads to genetic variation in new generations of offspring. the offspring is an unique organism, with new genome, more protected with the higher ability to adapted. this process is fundamental to evolution.