Question

multiple choice 2 points
an ancient archaic cell engulfed a cyanobacterium and allowed it to form a mutualistic relationship, because the cyanobacterium produced sugars that were usable by the archaic cell. the descendants of this archaic cell also inherited the cyanobacterial descendants of that first mutualistic cell, and thus were the first chloroplasts generated. this story describes a history of evolution which characterizes the ...
theory of natural selection
endosymbiotic theory
theory of genetic drift
theory of lateral gene transfer

Explanation:

The endosymbiotic theory posits that eukaryotic cells evolved from prokaryotic cells through a symbiotic relationship where one cell engulfed another and they became mutually - dependent. In this case, an ancient archaic cell engulfing a cyanobacterium to form the first chloroplasts is an example of endosymbiosis. The theory of natural selection is about survival and reproduction based on traits, genetic drift is about random changes in gene frequencies, and lateral gene transfer is about the transfer of genetic material between organisms other than by vertical inheritance.

Answer:

B. Endosymbiotic theory