Natural Selection
Biology ⇒ Evolution and Diversity
Natural Selection starts at 8 and continues till grade 12.
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See sample questions for grade 12
Describe how antibiotic resistance in bacteria is an example of natural selection.
Describe how sexual selection differs from natural selection.
Describe the difference between stabilizing, directional, and disruptive selection.
Describe the role of the environment in natural selection.
A population of beetles has green and brown color variants. Birds more easily spot and eat green beetles. Over time, the population becomes mostly brown. What type of selection is this? (1) Stabilizing selection (2) Directional selection (3) Disruptive selection (4) Artificial selection
A population of birds has a range of beak sizes. If birds with the smallest and largest beaks survive better than those with medium-sized beaks, what type of selection is occurring? (1) Stabilizing selection (2) Directional selection (3) Disruptive selection (4) Artificial selection
A population of rabbits lives in a snowy environment. Over generations, more rabbits have white fur instead of brown. What is the most likely explanation? (1) Genetic drift (2) Natural selection (3) Artificial selection (4) Mutation only
A scientist observes that a population of moths becomes darker in color after a volcanic eruption darkens the trees in their habitat. What is the most likely cause of this change? (1) Genetic drift (2) Natural selection (3) Artificial selection (4) Mutation only
A population of beetles has green and brown color variants. Birds more easily spot and eat green beetles. Over time, the population becomes mostly brown. What type of selection is this? (1) Stabilizing selection (2) Directional selection (3) Disruptive selection (4) Artificial selection
A population of birds has a range of beak sizes. If birds with the smallest and largest beaks survive better than those with medium-sized beaks, what type of selection is occurring? (1) Stabilizing selection (2) Directional selection (3) Disruptive selection (4) Artificial selection
A population of rabbits lives in a snowy environment. Over generations, more rabbits have white fur instead of brown. What is the most likely explanation? (1) Genetic drift (2) Natural selection (3) Artificial selection (4) Mutation only
A scientist observes that a population of moths becomes darker in color after a volcanic eruption darkens the trees in their habitat. What is the most likely cause of this change? (1) Genetic drift (2) Natural selection (3) Artificial selection (4) Mutation only
Fill in the blank: The ability of an organism to survive and reproduce in its environment is called ________.
Fill in the blank: The gradual change in the genetic makeup of a population over time is called ________.
Fill in the blank: The process by which a population becomes better suited to its environment is called ________.
Fill in the blank: The process by which alleles are transferred from one population to another is called gene ________.
True or False: Mutations are the only source of genetic variation in a population.
True or False: Natural selection always leads to the evolution of new species.
True or False: Natural selection can act on acquired characteristics.
True or False: Natural selection can act on behavioral traits as well as physical traits.
