A cluster of pigments in a photosystem allows for a. a high concentration of H+ ions. b. a low concentration of H2O used. c. multiple hits by the blue photons. d. a gradual buildup of red photons. e. a variety of photons to contribute.

this is true, assuming that the allele is completely recessive and incomplete dominance is not a factor.

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.