Natural Selection (Divergent/Convergent Evolution)

Mutations are random while natural selection is NOT

• True

• False

Why are advantageous traits more likely to be passed onto offspring?

• Because they are more likely to survive and reproduce.

• Because they come from dominant alleles.

• Because they come from recessive alleles.

• Because the organism knew it needed that trait, survived, and passed it on.

Why is the mouse population changing over time?

• The light mice can reproduce more successfully than the dark mice
• The hawks eat more dark mice than light mice because the dark mice taste better
• The hawks eat more light mice than dark mice because they can see the light mice more easily
• The hawks eat more dark mice than light mice because they can see the dark mice more easily

What process is being shown in this image?

• Variation
• Natural Selection
• Selective Breeding
• Homeostasis

Speciation can occur as a result of geographic isolation because _________.

• members of a species can no longer find mates

• populations that live in different environments may be exposed to different selection pressures

• exchange of genes during recombination

• movement of genes within a population because of interbreeding

What are examples of biotic features of an ecosystem?

• Frog, pond, competition and rocks

• Rocks, air, water and temperature

• Mosquito, frog, feeding relationships and competition

• Grass, apple tree, soil and mates

What are examples of abiotic features of an ecosystem?

• Turtle, fish, mosquito and feeding relationships

• Water, air, temperature and sunlight

• Fox, oxygen levels, human and grain

• Sunlight, whale, krill and water

Selection pressures are the same for all populations of a particular species. T/F

• True

• False

Selection pressures can include ...

• competition for mates

• avoiding being eaten by a predator

• competition for food

• dealing with a change in environment (eg temmperature)

Natural selection will affect genetic diversity by ...

• increasing the frequency of advantageous alleles and decreasing the frequency of disadvantageous alleles.

• decreasing the frequency of advantageous alleles and increasing the frequency of disadvantageous alleles.

• reducing the size of the population

• increasing the rate of mutation