Which of the following best explains why a variety of monomers are needed to produce the complex molecules necessary for life? a. different monomers contain different kinds of atoms needed to produce different end products. b. all monomers contain the same kinds of atoms, but their unique structures result in different end products. c. different monomers contain different amounts of energy needed to initiate product formation. d. all complex molecules are formed from nucleotides, but other kinds of monomers are needed to produce energy.

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.

photosynthesis makes the glucose that is used in cellular respiration to make atp. the glucose is then turned back into carbon dioxide, which is used in photosynthesis. while water is broken down to form oxygen during photosynthesis, in cellular respiration oxygen is combined with hydrogen to form water.