Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions. The changes you might observe in the fossil record that would indicate the occurrence of a mass extinction is the <span>disappearance and subsequent absence of many up till then long-established groups.</span>
It is choice B. Haploid cells contain one copy of genetic information. (ex sperm, egg) Diploid cells contain two copies of the genetic information. (ex muscle, bone brain, eye, etc.)
