Mutations . are always harmful. add new genes to a gene pool. are never beneficial to survival. give organisms what they need to survive.

Mutations deletion are always harmful. add new genes to a gene pool. are never beneficial to survival. give organisms what they need to survive.

Explanation:

It may be randomly like:

□caused by the mutation of a single gene.

OR

□genetic disorders include cystic fibrosis, sickle cell anemia, Tay-Sachs disease, phenylketonuria and color-blindness, among many others.

answer: a) a compound microscope has a greater magnification ability than a simple microscope.

explanation:

acceleration= v2-v1/t so 8m/s-3m/s / 3s =to 8/3 or

2.67 m/s^2

hope i

-lavira: )