Science Vocabulary

1. How a trait appears, or is expressed.
4. Slight differences in inherited traits among individual members of a species.
5. An adaptation that enables a species to blend in with its environment.
7. The study of similarities and differences among structures of living and fossil species.
8. A fossil that has characteristics of both ancestral organisms and organisms that evolved later.
14. The different forms of a gene are called alleles.
15. An inherited trait that helps a species survive in its environment.
16. Food products that have been genetically engineered.
18. Body parts or structures that were inherited by two or more species from a common ancestor.
19. The biological and chemical methods that change the arrangement of DNA that makes up a gene.
20. Body parts that perform a similar function but differ in structure.

2. When the last individual organism of a species dies.
3. The resemblance of one species to another.
6. The selection and breeding of organisms with desired traits.
9. Are body parts that have lost their original function through evolution.
10. The process by which individuals with variations that help them survive in their environments live longer.
11. Thread-like structures that contain genetic information that controls traits.
12. A permanent change in the sequence of DNA.
13. The two alleles that control the phenotype of a trait.
17. The change overtime in populations of related organisms.