Chapter 15

2. he wrote the essay,Principle of Population
6. change in kind of organism over time
8. populations of living organisms adapt and change
9. A rudimentary structure in humans corresponding to a functional structure or organ in the lower animals
11. organs or skeletal elements of animals and organisms that suggest their connection to a common ancestor
12. preserved remains or evidence of an ancient organism
13. when one species is the ancestor of two or more species later in time
14. well-tested explanation that unifies a broad range of observations
15. he published his hypothesis of the inheritance of acquired traits
18. species change over time, give rise to new species, and share a common ancestor

1. organisms best adjusted to their environment are the most successful in surviving and reproducing
3. the identification by humans of desirable traits in plants and animals
4. the biological mechanism by which organisms adjust to new environments or to changes in their current environment
5. reproductive success and reflects how well an organism is adapted to its environment
7. a geologist who demonstrated the power of known natural causes in explaining Earth's history
10. the automatic competition of members of a natural population for limited vital resources
16. best known for his contributions to science
17. Often referred to as the ‘father’ of modern geology