Why is important to maintain healthy ecosystems.

    Healthy ecosystems purify our water, clean our air, maintain the soil, regulate the climate, recycle nutrients, and provide us with food. They provide raw materials and resources that can be made into medicines and other things. Biodiversity is the key indicator of the health of an 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.