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 8
A population of beetles has green and brown individuals. Birds can see green beetles more easily. Over time, the population has more brown beetles. What process is this an example of?
A population of birds has a range of beak sizes. If the environment changes so that only large seeds are available, what is likely to happen to the population over time?
A population of insects is exposed to a new pesticide. Most die, but a few survive because they have a gene that makes them resistant. Over time, the population becomes mostly resistant. What process is this?
A population of rabbits lives in a snowy environment. Some have white fur, others have brown fur. Predators more easily catch brown rabbits. Over generations, most rabbits have white fur. What is this an example of?
A population of beetles has green and brown individuals. Birds can see green beetles more easily. Over time, the population has more brown beetles. What process is this an example of?
A population of birds has a range of beak sizes. If the environment changes so that only large seeds are available, what is likely to happen to the population over time?
A population of insects is exposed to a new pesticide. Most die, but a few survive because they have a gene that makes them resistant. Over time, the population becomes mostly resistant. What process is this?
A population of rabbits lives in a snowy environment. Some have white fur, others have brown fur. Predators more easily catch brown rabbits. Over generations, most rabbits have white fur. What is this an example of?
Which of the following best describes adaptation? (1) A learned behavior (2) A trait that increases an organism's chance of survival (3) A random mutation with no effect (4) A change in the environment
Which of the following is a key factor in natural selection? (1) Random mating (2) Environmental pressures (3) Unlimited food supply (4) Identical offspring
Which of the following is a source of genetic variation in a population? (1) Cloning (2) Mutation (3) Uniform reproduction (4) Identical twins
Which of the following is an example of an adaptation? (1) A bird's beak shape suited for eating seeds (2) A scar from an injury (3) A learned language (4) A broken bone
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 certain inherited traits become more common in a population because they increase an organism's __________ is called natural selection.
Fill in the blank: The process by which certain traits become more common in a population because they increase survival or reproduction is called __________.
Fill in the blank: The process by which humans breed plants or animals for specific traits is called __________ selection.
True or False: Individuals can adapt to their environment during their lifetime through natural selection.
True or False: Natural selection acts on populations, not individuals.
True or False: Natural selection always leads to the evolution of new species.
True or False: Natural selection can act on both physical and behavioral traits.
