Bio Ch 22

Front 1

catastrophism

Back 1

the principle that events in the past occurred
suddenly and were caused by mechanisms different
from those operating in the present.

Front 2

uniformitarianism

Back 2

stated that
mechanisms of change are constant over time. Lyell proposed
that the same geologic processes are operating today as
in the past, and at the same rate.

Front 3

adaptation

Back 3

characteristics of organisms that enhance
their survival and reproduction in specific
environments.

Front 4

natural selection

Back 4

a process in which individuals with certain inherited
traits leave more offspring than individuals with other traits

Front 5

Artificial Selection

Back 5

modified species over many generations by selecting and breeding individuals that possess desired
traits-a process

Front 6

homology

Back 6

a result, related species can have
characteristics with an underlying similarity even though they
may have very different functions. Such similarity resulting
from common ancestry.

Front 7

Vestigial Structures

Back 7

are remnants of features that served important
functions in the organism's ancestors.

Front 8

Homologous Structures

Back 8

represent variations on a
structural theme that was present in their common ancestor.

Front 9

Convergent Evolution

Back 9

the independent evolution of similar
features in different lineages.

Front 10

analogous

Back 10

in which species share features because of convergent evolution, the resemblance are said to be
__________, not homologous.

Front 11

endemic

Back 11

meaning that they are found nowhere else in the world.