please answer's these scientist answer's
A scientist observes that the leg bones of cats are similar to the bones in the wings of bats. The scientist concludes the two species share a common ancestor. Which describes why the scientist drew that conclusion?

1. developmental patterns
2. DNA
3. fossil evidence
4 .structural data

Bald eagles might lay up to five eggs at a time, but only one hatchling usually survives. Which feature of natural selection is this an example of?

1 .adaptation
2. genetic variation
3. overproduction
4. selection