Section 19.1 (Exam 3) Flashcards
Evolution Is Both Factual and the Basis of Broader Theory
1
Q
What is evolution?
A
change in genetic composition of a population over time
2
Q
Darwin’s observations led him to create a theory of evolution with three propositions. What were they?
A
Species change over time
Descent with modification
Natural selection
3
Q
What does descent with modification mean?
A
Divergent species share a common ancestor, and species have diverged gradually through time
4
Q
What is natural selection?
A
different survival and reproduction of individuals in a population based on variation in their traits
5
Q
What was Darwin’s book called and when was it published?
A
“On the Origin of Species” published in 1859
6
Q
What does evolution by natural selection require?
A
genetic variation among individuals
