First stage of photosynthesis where certain wavelengths of the visible light are absorbed to form two energy-carrying molecules (atp and nadph).

a. light-dependent reactions
b. calvin cycle
c. carbon fixation
d. electron transport chain

several tissues working together form an organ, and several organs together make up an organisms.

the group of cell that carries out special jobs are tissue.

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.