1.Write one sentence defining pure substances and one sentence defining mixtures.
2.Write one sentence describing the similarity between pure substances and mixtures, and one sentence describing the difference between pure substances and mixtures.
3.Write one sentence defining elements (don’t use the sentence from Page 5), and one sentence defining compounds.
4.Write one sentence describing the similarity between elements and compounds, and one sentence describing the difference between elements and compounds.

they fuse to form they have half as many chromosomes as a somatic cell of the same individual. b

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.

c is the correct answer!