Chapter 7.1: Adaptation and Variation Flashcards
1
Q
how does natural selection work?
A
individuals with certain inherited traits survive specific local environmental conditions and, through reproduction, pass their alleles on to their offspring
2
Q
Natural selection only occurs if there is ______ within a population.
A
genetic diversity
3
Q
examples of selective pressure (4)
A
- temperature change
- light level change
- change in predators
- change in competition
4
Q
example of artificial selection
A
chicken bred to produce more eggs
5
Q
what are the downsides to artificial selection
A
- decreases genetic diversity in a population, which makes the population less fit for environmental changes and natural selection
- monocultures prone to environmental change
