1. is the gradual process by which an organism over time. 2. Scientists use from the record to help them explain how living things evolve.3. is a key mechanism of evolution. 4. Scientists believe that humans share a with other primates like chimpanzees, but they did not from them.5. Scientists determine evolutionary relationships between organisms by studying in how develop

Answer 1

. 1. evolution, changes
2. evidence, fossil
3. Natural selection
4. common ancestor, descend
5. similarities, organisms