Mechanisms of Evolution

In a population of ladybugs, black bugs are more successful in escaping predators. Overtime, this gene becomes more popular in the population and the allele for red coloration decreases.

• Natural Selection

• Mutation

• Genetic Drift

• Gene Flow

A lion gets chased off from his pride (group), then joins another pride. He mates with a lioness and make 6 lion cubs.

• Natural Selection

• Mutation

• Genetic Drift

• Gene Flow

A powerful hurricane strikes the coast of Cape Hatteras in Northern California. The storm wipes out half the population of blue jays in that area.

• Natural Selection

• Mutation

• Genetic Drift

• Gene Flow

In a population of Toucan birds. Females seek out male birds with yellowish coloring to mate and reproduce with. Green Toucan birds are less successful.

• Genetic Drift

• Non-random mating

• Gene flow

• Mutation

What does the image represent?

• Founder effect
• Bottleneck effect
• Natural Selection
• Mutations

Tags

NGSS.HS-LS4-2

NGSS.HS-LS4-4

Which scientist is most closely associated with proposing the theory of Natural Selection and "survival of the fittest" as a driving force of Evolution?

• Charles Darwin

• Gregor Mendel

• Rosalind Franklin

• Neil DeGrasse Tyson

What type of natural selection is represented by this graph?

• Disruptive Selection

• Directional Selection

• Stabilizing Selection

• Sexual Selection

What type of selection is represened by this graph?

• stabilizing

• directional

• disruptive

• gene flow

Human babies don't do well if they are born too small. If they are too big complications can occur during birth. Babies born with average birth weights have a better chance of survival.

• stabilizing

• directional

• disruptive

• don't have babies

There was once a large population of cheetah, but about 12,000 years ago most of the cheetahs were killed off because of human activity and only a few survived. What is this an example of?

• Bottleneck Effect

• Sexual Selection

• Founder Effect

• Natural Selection