Question

Match sentence and word.- Often the fossil record is incomplete becauseAnswer 1- The arm bones of the whales and dogs are Answer 2- When mutations change the DNA sequence, it sometimes leads to Answer 3 - Parts of living things that come from the same basic structure even if the actual use of that structure is different.Answer 4- Homologous structures Answer 5

Answer 1

In order of appearance, the answers are:

1.- not all fossil types have been found.

2.- homologous structures.

3.- variation in the protein structures that lead to changes in a trait.

4.- homologous structures.

5.- the wing of a bird, fin of a whale, and arm of a human.