#46 8 STAAR 7.13D Natural and Artificial Selection

What is natural selection?

• The process by which humans breed plants and animals for desired traits.

• The process by which organisms better adapted to their environment tend to survive and produce more offspring.

• The random change in allele frequencies in a population.

• The introduction of new species into an ecosystem.

Tags

TEKS.SCI.7.13D

Which of the following is an example of artificial selection?

• A giraffe developing a long neck to reach high leaves.

• Farmers breeding cows to produce more milk.

• A bird developing a beak suited for its food source.

• A fish developing camouflage to avoid predators.

Tags

TEKS.SCI.7.13D

Explain how natural selection can lead to the development of a new trait in a population over generations.

• Natural selection can lead to a new trait by introducing new species into an ecosystem.

• Natural selection can lead to a new trait by favoring individuals with advantageous traits, increasing their frequency in the population over time.

• Natural selection can lead to a new trait by randomly changing the genetic code of individuals.

• Natural selection can lead to a new trait by artificially selecting individuals with desired characteristics.

Tags

TEKS.SCI.7.13D

How does artificial selection differ from natural selection in terms of the driving force behind trait changes?

• Artificial selection is driven by environmental pressures, while natural selection is driven by human choices.

• Artificial selection is driven by human choices, while natural selection is driven by environmental pressures.

• Both artificial and natural selection are driven by random genetic mutations.

• Both artificial and natural selection are driven by the need for survival.

Tags

TEKS.SCI.7.13D

Evaluate the impact of selective breeding on the genetic diversity of a species.

• Selective breeding increases genetic diversity by introducing new genes.

• Selective breeding decreases genetic diversity by favoring specific traits and reducing variation.

• Selective breeding has no impact on genetic diversity.

• Selective breeding increases genetic diversity by creating new species.

Tags

TEKS.SCI.7.13D

Predict how a population of insects might change if a new pesticide is introduced and only a few individuals are resistant.

• The entire population will die out due to the pesticide.

• The resistant individuals will survive and reproduce, leading to a population more resistant to the pesticide over time.

• The population will remain unchanged as the pesticide has no effect.

• The population will develop resistance immediately without any survivors.

Tags

TEKS.SCI.7.13D