Natural Selection

4. a theory that suggests that geological processes have been taking place at a constant rate
7. this type of structure is sometimes referred to as an evolutionary left-over
9. this guy was an English economist who theorized about resources and the growing population
10. the modification of species due to human intervention
12. what many Europeans believed to be the origin of plants and animals
15. a type of intermediate organism
18. reproductive success which leads to more surviving offspring
19. the name of Darwin's ship
20. this guy was a Scottish geologist who wrote about geological time

1. where Darwin studied after medical school
2. this type of structure is similar in different species
3. this guy was a French naturalist who proposed organisms change based on use and disuse of body parts
5. a theory that is based on sexual recombination and mutations
6. this guy calculated the world was created on October 23, 4004 BC
8. antibiotic resistance is an example of this type of evidence for evolution
11. a theory based on characteristic traits developing based on need
12. this guy proposed and wrote about naturalselection
13. this gal is who Darwin married
14. this type of trait is similar in different species, the structure is different but the function is the same
16. the imprint or remains of an organism that lived in the past
17. this guy proposed a natural selection theory and shared his research with Darwin