Science

3. the father of genetics.
5. refers to a group of organisms that share similar characteristics, features, and genetic composition.
7. refers to any change in the genetic composition of an organism
9. inherited body parts, which are smaller and often unused.
12. it controls the growth and development of an embryo.
13. used by scientists to show the relationships among organisms.
17. oldest human ancestor.
19. used by scientists to reconstruct the complete structure of an organism.
20. molecules that help build and repair body parts.

1. german evolutionary biologist that experimented on 901 mice.
2. caused by the bacterium Streptococcus pneumoniae
4. similar structures that evolved from the same ancestral body parts but may have different functions.
6. one of the greatest biologist of all time.
8. how organisms of the same species produce fertile offspring.
10. describes the development of new species.
11. occurs when some members of a species are suddenly separated from the rest of the population.
14. structures similar functions but different anatomy.
15. preserved remains of an organism.
16. refers to the movement of genes from one generation to the next, or from one region to another.
18. an organism in its early stages of development.