A dichotomus key is a tool that is used by the scientists, they use it to help identify a particular specimen while branching is just a branching into two
Answer:
b. A small group of individuals must leave a population.
Explanation:
The answer is; E
This shows that these organelles were once free-living organisms with their own mechanisms for reproduction which they have retained even after years of symbiotic relationship with the higher organisms. During their duplication, they also replicate their own DNA. Their DNA does not have histones (as opposed to the DNA in the nucleus of their host eukaryotic cell) similar to that of simple organisms such as bacteria.