Which types of organisms developed first due to the early enviromental conditions on earth?

answer:

single-celled organisms or bacteria.

explanation:

the first cells are thought to have been similar to archaea of today. archaea is a group of single-celled prokaryotic cells. being prokaryotic, archaea lack a nucleus and other membrane-bound organelles that are characteristic of more developed eukaryotic cells. archaea are able to live in extreme environments. halophiles are a group of archaea that are able live in extremely salty environments. thermophiles are a group archaea that are able to live in extremely hot

the correct answer is:

a population changes in response to a change in the environment.

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.