When is it necessary for a scientists to do research? ?

Explained

Explanation:

A research is necessary before deducing a hypothesis that is a research is necessary to determine the dependence of a particular process on the various factor which can directly or indirectly can affect the process .

Without conducting the research experiment it is aimless to for a scientist what is he looking for.

While describing a unknown phenomena it is necessary to conduct the research to know the principle behind it.

succession returns a disturbed

ecosystem to a more stable state. this is also classified into two (2) types:

primary succession and secondary succession. the primary succession arises when

a new land is transformed and a bare rock has been exposed providing an environment

that can be occupied for the first time. while, secondary succession occurs

when a previously occupied environment was disturbed that kills much of all its

community

explanation:

what is shown in the image?

eukaryote

chloroplast

mitochondrion

submitted