If a cell was observed under the microscope and found to have a rigid cell wall and be green in color that cell is most likely a

Plant cell

Explanation:

Plant cells are rigid. The green color comes from chlorophyll. Plants also have cell walls, because unlike animal cells that have a skeleton to support them, the plant cells need to support themselves.

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.