Question

complete the statement below using the drop-down menus. it is believed mitochondria evolved from dropdown, while chloroplasts evolved from dropdown.

Explanation:

The endosymbiotic theory states that mitochondria evolved from aerobic prokaryotes (like proteobacteria) and chloroplasts evolved from photosynthetic prokaryotes (like cyanobacteria). So for the first blank, the appropriate option would be "aerobic prokaryotes" (or similar terms like "free - living aerobic bacteria") and for the second blank, "photosynthetic prokaryotes" (or "free - living cyanobacteria" etc.).

Answer:

First drop - down: aerobic prokaryotes (or free - living aerobic bacteria)
Second drop - down: photosynthetic prokaryotes (or free - living cyanobacteria)