The Endosymbiont Theory is Support by Several Lines of Evidence

Question

The endosymbiont theory is support by several lines of evidence one of which is ____.
A)mitochondria,chloroplast,and bacteria all have circular chromosomes
B)the chloroplast genome resembles the genome of the mitochondria
C)both mitochondria and chloroplasts generate ATP
D)both mitochondria and peroxisomes have circular chromosomes
E)both bacteria and lysosomes have degradative enzymes

Accepted Answer

One of the lines of evidence supporting the endosymbiont theory is that both mitochondria and chloroplasts have circular chromosomes, similar to those found in bacteria. This supports the theory that mitochondria and chloroplasts once were free-living bacteria that were engulfed by a larger host cell, eventually forming a symbiotic relationship.