1. compare and contrast adaptation and fitness  2. How do scientists know evolution is taking place

1. Fitness is not a trait but a technical embodiment of assumptions about selection. ... Adaptations are polished products of natural selection with particularly clear relationships to particular problems faced by the organisms that posses them. 2. Fossils are the remains of long-dead organisms, preserved in rock. Because rocks are laid down in layers, one on top of the other, the fossil record is generally set out in date order: the oldest fossils are at the bottom. Running through the fossil record makes it clear that life has changed over time. The scientific evidence for evolution is overwhelming. Volumes of data collected in the field and the laboratory show that all species arose from common ancestors and that species change over time. A classic example is the finch population on the Galapagos Islands.

Explanation:

straight or amphibians are homeothermic to thermal