1commensalism is a symbiosis where one species and the other is neither harmed nor gains a benefit.

is harmed

benefits

is unaffected

none of the above

2which of the following human impacts has not negatively affected the environment?

pollution

pesticides

removal of predators

none of the above

it is prolly d and c and f

thinking it would be d not too sure but i think it's right

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.