Question

question 7 of 10
which is used as evidence for the idea that multicellular organisms evolved from prokaryotes?
a. multicellular organisms do not have a nucleus.
b. prokaryotes no longer exist anywhere on earth.
c. mitochondria and chloroplasts have their own dna.
d. unicellular organisms do not contain dna.

Explanation:

The endosymbiotic theory suggests that mitochondria and chloroplasts were once free - living prokaryotes. Their own DNA, similar to prokaryotic DNA (circular), supports the idea that multicellular organisms (with these organelles) evolved from prokaryotes.

• Option A is wrong because multicellular organisms are eukaryotes and have a nucleus.
• Option B is incorrect as prokaryotes (like bacteria) still exist.
• Option D is false since all cellular organisms (including unicellular ones) contain DNA.

Answer:

C. Mitochondria and chloroplasts have their own DNA.