Answer:
B, A fossil found in rocks from one time period
Explanation:
Fossils are used to determine the ages of rock layers. Index fossils are the most useful for this. Index fossils are of organisms that lived over a wide area. They lived for a fairly short period of time. An index fossil allows a scientist to determine the age of the rock it is in. Hope that this helps you :)
An allele is like a trait or a specific gene.
I think it is D hope I’m right
Animal rights are important because animals at living creatures just like humans.
Answer:
beneficial because you could fly faster and have more power to go higher :)