a. Mitochondria and chloroplasts have their own DNA, which is similar to prokaryotic DNA

Question

(circular structure).

b. Fossil evidence shows that the first forms of life were prokaryotic cells.

c. All eukaryotic cells have a double‑layered membrane composed of phosplipids and proteins.

d. Prokaryotes have the same number and types of enzymes as eukaryotes.
Which of the following is evidence to support the endosymbiotic theory?
Q6

Answer 1

The endosymbiotic theory posits that certain organelles in eukaryotic cells, specifically mitochondria and chloroplasts, originated from prokaryotic cells through a symbiotic relationship. To identify which of the statements supports this theory, let’s analyze each option:

a. Mitochondria and chloroplasts have their own DNA, which is similar to prokaryotic DNA (circular structure).

• This statement supports the endosymbiotic theory because it suggests that mitochondria and chloroplasts originate from ancient prokaryotes, as prokaryotic DNA is typically circular.

b. Fossil evidence shows that the first forms of life were prokaryotic cells.

• While this statement is a fact about the history of life on Earth, it is not direct evidence for the endosymbiotic theory specifically.

c. All eukaryotic cells have a double-layered membrane composed of phospholipids and proteins.

• Though this describes the structure of eukaryotic cells, it does not serve as evidence for the endosymbiotic theory directly.

d. Prokaryotes have the same number and types of enzymes as eukaryotes.

• This statement is generally not accurate and does not provide evidence for the endosymbiotic theory.

Conclusion: The statement that best supports the endosymbiotic theory is (a) Mitochondria and chloroplasts have their own DNA, which is similar to prokaryotic DNA (circular structure).

Answer 2

which is the right answer

Answer 3

The correct answer that supports the endosymbiotic theory is:

a. Mitochondria and chloroplasts have their own DNA, which is similar to prokaryotic DNA (circular structure).

This statement highlights the significant similarity between the DNA of mitochondria and chloroplasts and that of prokaryotes, providing evidence for the idea that these organelles originated from ancestral prokaryotic cells through an endosymbiotic process.