FIRST PERSON TO ANSWER GETS BRAINLIEST

A

Explanation:

Both mitochondria and chloroplast lack a nucleus, but instead, they are found in the cell (which is mostly eukaryotic). They are also thought to have their evolutionary origins as simple single-celled organisms.

evidence and logical support is essential for a scientist to do in order to maintain credibility. this is because no one can believe without any logic and without any evidence.hence a scientist can maintain credibility by proving himself and by answering logically so experiments prove very beneficial. logical hypothesis give conclusion which is acceptable. therefore, there are two main factors to maintain credibility by a scientist is evidence and logical support.