1.
A group of similar organisms that can mate with each other and produce offspring that can also mate and reproduce.________________________
2.
Any difference between individuals of the same species.________________________
3.
Change over time; the process by which modern organisms have descended from ancient organisms.________________________
4.
The preserved remains or traces of an organism that lived in the past.________________________
5.
An inherited behavior or physical characteristic that helps an organism survive and reproduce in its environment.________________________
6.
A well-tested explanation for a wide range of observations or experimental results.________________________
7.
The natural process by which something takes place.________________________
8.
The process by which organisms that are best adapted to their environment are most likely to survive and reproduce.________________________
9.
The struggle between organisms to survive as they attempt to use the same limited resources in the same place at the same time.________________________
10.
Any change in the DNA of a gene or a chromosome.________________________
11.
How well an organism can survive and reproduce in its environment.________________________
12.
A type of natural selection that acts on an organism's ability to get the best possible mate.________________________
13.
The process by which two species evolve in response to changes in each other over time.________________________
14.
All the fossils that have been discovered and what scientists have learned from them.________________________
15.
The young organism that develops from a zygote.________________________
16.
Structures that are similar in different species and that have been inherited from a common ancestor.________________________
17.
Term used to refer to a group of related organisms that have died out and have no living members.________________________
18.
Large organic molecule made of carbon, hydrogen, oxygen, nitrogen, and sometimes sulfur.________________________
