Question

What is the evidence for secondary endosymbiosis?

a. Presence of organelles with their own DNA
b. Presence of 3 separate lipid bilayers
c. Similarity of organelles DNA sequence to prokaryotes
d. Presence of 2 separate lipid bilayers
e. The ability to photosynthesize

Answer 1

Secondary endosymbiosis is supported by the presence of organelles with their own DNA, the similarity of organelles DNA sequence to prokaryotes, and the presence of 3 separate lipid bilayers.

Step-by-step explanation:

Secondary endosymbiosis is supported by several lines of evidence:

1. Presence of organelles with their own DNA: Chloroplasts and mitochondria have their own DNA, similar to prokaryotes.
2. Similarity of organelles DNA sequence to prokaryotes: Mitochondrial DNA and chloroplast DNA are highly related to bacterial DNA in terms of sequence and chromosome structure.
3. Presence of 3 separate lipid bilayers: The double membrane structure of mitochondria and chloroplasts is a direct result of endosymbiosis.