Science Vocabulary

2. The study of similarities and differences among structures of living and fossil species.
7. A fossil that has characteristics of both ancestral organisms and organisms that evolved later.
10. Thread-like structures that contain genetic information that controls traits.
11. Slight differences in inherited traits among individual members of a species.
12. The selection and breeding of organisms with desired traits.
14. The biological and chemical methods that change the arrangement of DNA that makes up a gene.
16. Body parts that perform a similar function but differ in structure.
18. Body parts or structures that were inherited by two or more species from a common ancestor
19. The two alleles that control the phenotype of a trait.
20. Food products that have been genetically engineered.

1. Are body parts that have lost their original function through evolution.
3. When the last individual organism of a species dies.
4. A permanent change in the sequence of DNA.
5. The different forms of a gene are called alleles.
6. The resemblance of one species to another.
8. An inherited trait that helps a species survive in its environment.
9. An adaptation that enables a species to blend in with its environment.
13. How a trait appears, or is expressed.
15. The process by which individuals with variations that help them survive in their environments live longer.
17. The change overtime in populations of related organisms.