Like math, there are two sides to an equation. Look at the chemical reaction
below. Label the Reactants & the Products
250, + 0, + 2H2O
2H, 504

it's anything that aren't producers and consumers.

explanation:

you've got to be clear on what "this" is

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.