Question

The endosymbiont theory holds that mitochondria were originally bacteria-like single-celled organisms. Which of the following facts support this theory?

Mitochondria carry out aerobic respiration.
Mitochondria have their own DNA.
Different cells contain different numbers of mitochondria.
Mitochondria reproduce themselves independently.
A.
III and IV only
B.
II and III only
C.
II and IV only
D.
I, III, and IV only

Answer 1

The answer is II and IV only

Step-by-step explanation:

Answer 2

Mitochondria carry out aerobic respiration reproduces themselves independently and it contains different cells for its different numbers.

Option (d): Statement I, III, IV

EXPLANATION:

Mitochondria are known to be powerhouses of a cell. They are specialized in aerobic respiration and generate ATP. It is found in the cytoplasm of the cell where most of the respiration happens.

Then, also the number of mitochondria in each cell are different. For example RBCs in humans do not have mitochondria but liver cells in the human body have hundreds or thousands of mitochondria. They divide independently by a method of splitting called binary fission.