Question

1. which evidence best supports the endosymbiotic theory?

a. cells divide by mitosis
b. ribosomes assemble proteins
c. cell membranes are selectively permeable
d. mitochondria contain their own dna

Explanation:

The endosymbiotic theory proposes that eukaryotic organelles like mitochondria and chloroplasts originated from prokaryotic organisms. Mitochondria having their own DNA (similar to prokaryotes) supports this, as prokaryotes have their own circular DNA. Options a (mitosis is eukaryotic cell division), b (ribosomes making proteins is a general cell function), and c (selective permeability of cell membranes is a basic cell property) don't relate to endosymbiosis as directly as d.

Answer:

d. Mitochondria contain their own DNA