Single-celled organisms may move using A. flagella. B. cilia. C. pseudopods. D. all of these

the answer to your question is slate

c. heat from the poles back down towards the equator.

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.