Chapter 15 Vocab Flashcards Preview

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Flashcards in Chapter 15 Vocab Deck (13)
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1

Theory

A well supported testable explanation of phenomena that have occurred in the natural world

2

Fossil

The preserved remains of ancient organisms

3

Artificial selection

Humans select from among the naturally occurring genetic variations in a species

4

Struggle for existence

Members of each species compete regularly to obtain food, living space, and other necessities

5

Fitness

The ability of an individual to survive and reproduce in its specific environment

6

Adaptation

Any inherited characteristic that increases an organisms chance of survival

7

Survival of the fittest

When individuals are better suited to their environment and survive and reproduce successfully

8

Natural selection

Only certain individuals of a population produce new individuals; also referred to as survival of the fittest

9

Descendent with modification

Each living species has descended, with changes, from other species over time

10

Common descendent

All species- living and extinct- were derived from common ancestors

11

Homologous structure

Structures that have different mature forms but develop from the same embryonic tissues

12

Vestigial organ

Organs of many animals that are reduced in size that they are just vestiges, or traces, of homologous organs in other species

13

Evolution

Change over time; the process by which modern organisms have descended from ancient organisms