Mutations are always
a. Good
b. Bad
c. Neutral
d. Natural occurrences

D

Explanation:

Mutations can be good, bad, or neutral so the answer must be d, that they occur naturally. In any given environment many mutations can occur, but the mutation's effect on an ecosystem or being can vary. Mutation happen to people, diseases, animals, and even plants.

the answer is c cumulus. cumulus clouds can be seen on a gray and rainy day, because cumulus clouds create thunderstorms. give me brainliest if right.

the correct answer is: b. pantala flavescens, because these organisms would have a high level of genetic variation due to sexual reproduction.  

because involves two organisms (parents) whose genetic material combines, sexual reproduction leads to genetic variation in new generations of offspring. the offspring is an unique organism, with new genome, more protected with the higher ability to adapted. this process is fundamental to evolution.