Which are explanations or statements based on facts in the scientific community?

Explanation or statements based on facts are termed as Theory.

Definition : A scientific theory is an explanation of some aspect of the nature that incorporates the facts, laws, inferences, and tested hypotheses." Explanation :

answer; the above answer to the above statement is (true)

the diploid number of chromosomes is sometimes represented by the symbol 2n. for the fruit fly, the diploid number is 8, which can be written as 2n = 8, where n represents twice the number of chromosomes in a sperm or egg cell.