Explain why increased ecosystem diversity contributes to increase biodiversity in the biosphere

With greater biodiversity, there is less of an impact on the ecosystem if a specific (keystone) species dies off.

A diverse set of ecosystems means that there will be a wide variety of selection pressures exerted on the organisms.

Thus, natural selection will act to bring out the best suited traits for that particular ecosystem.

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.

thinking it would be fimbriae