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 11
Describe how environmental changes can affect natural selection.
Describe how sexual selection is related to natural selection.
Describe the relationship between natural selection and evolution.
Describe the role of genetic variation in natural selection.
A population of insects is exposed to a new pesticide. After several generations, most insects are resistant to the pesticide. What is the most likely explanation? (1) The pesticide caused mutations in the insects. (2) Insects learned to avoid the pesticide. (3) Insects with resistance genes survived and reproduced. (4) All insects became resistant at the same time.
A population of plants has both tall and short individuals. If only the tallest plants survive to reproduce, what type of selection is occurring? (1) Stabilizing selection (2) Directional selection (3) Disruptive selection (4) Artificial selection
A population of rabbits has white and brown fur. In a snowy environment, white rabbits are less likely to be seen by predators. Over time, the population becomes mostly white. What is this an example of? (1) Disruptive selection (2) Directional selection (3) Stabilizing selection (4) Artificial selection
In a population of beetles, green beetles are more likely to be eaten by birds than brown beetles. Over time, the population becomes mostly brown. What type of selection is this? (1) Disruptive (2) Directional (3) Stabilizing (4) Artificial
A population of insects is exposed to a new pesticide. After several generations, most insects are resistant to the pesticide. What is the most likely explanation? (1) The pesticide caused mutations in the insects. (2) Insects learned to avoid the pesticide. (3) Insects with resistance genes survived and reproduced. (4) All insects became resistant at the same time.
A population of plants has both tall and short individuals. If only the tallest plants survive to reproduce, what type of selection is occurring? (1) Stabilizing selection (2) Directional selection (3) Disruptive selection (4) Artificial selection
A population of rabbits has white and brown fur. In a snowy environment, white rabbits are less likely to be seen by predators. Over time, the population becomes mostly white. What is this an example of? (1) Disruptive selection (2) Directional selection (3) Stabilizing selection (4) Artificial selection
In a population of beetles, green beetles are more likely to be eaten by birds than brown beetles. Over time, the population becomes mostly brown. What type of selection is this? (1) Disruptive (2) Directional (3) Stabilizing (4) Artificial
Fill in the blank: A trait that increases an organism's chance of survival and reproduction in a particular environment is called an __________.
Fill in the blank: The ability of an organism to survive and reproduce in its environment 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 certain traits become more or less common in a population due to chance events is called __________ drift.
True or False: Natural selection acts on the phenotype, not the genotype, of an organism.
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.
