Unit 4 Study Guide

Which of the following best explains how genetic variation can influence the survival of a species in a changing environment?

• Genetic variation ensures that all individuals in a species are identical, which helps them survive.

• Genetic variation increases the likelihood that some individuals in a species will possess traits that help them survive changes in the environment.

• Genetic variation decreases the probability of survival because it leads to more competition among individuals.

• Genetic variation has no impact on the survival of a species.

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How do environmental factors play a role in the reproduction of a species?

• Environmental factors always decrease the reproduction rate of a species.

• Environmental factors can influence which traits are favorable, affecting which individuals are more likely to reproduce.

• Environmental factors have no impact on the reproduction of a species.

• Environmental factors ensure that all individuals reproduce equally.

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Which question would be most effective in gathering information about how humans influence the inheritance of traits through selective breeding?

• How do humans choose which animals to breed?

• What are the natural habitats of selectively bred animals?

• How does selective breeding affect the lifespan of animals?

• What are the dietary needs of selectively bred plants?

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What is a key difference between asexual and sexual reproduction in terms of genetic information?

• Asexual reproduction results in offspring with genetic variation, while sexual reproduction results in identical offspring.

• Asexual reproduction results in offspring with identical genetic information, while sexual reproduction results in genetic variation.

• Both asexual and sexual reproduction result in offspring with identical genetic information.

• Both asexual and sexual reproduction result in offspring with genetic variation.

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Which of the following scenarios best illustrates the concept of selective breeding?

• A farmer plants seeds from the tallest plants to produce a crop of tall plants.

• A gardener waters plants regularly to ensure they grow well.

• A scientist observes wild animals in their natural habitat.

• A pet owner feeds their dog a balanced diet.

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How might a model be used to demonstrate the process of asexual reproduction?

• By showing how two different organisms combine genetic material.

• By illustrating how a single organism replicates its genetic material to produce identical offspring.

• By depicting the environmental factors that affect reproduction.

• By comparing the lifespans of different organisms.

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Which of the following is an example of how genetic variation can affect the probability of survival in a species?

• All members of a species have the same resistance to a disease.

• Some members of a species have a genetic trait that makes them resistant to a disease, increasing their chances of survival.

• Genetic variation causes all members of a species to be equally vulnerable to environmental changes.

• Genetic variation has no effect on disease resistance in a species.

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What role does reasoning play in understanding the impact of selective breeding on trait inheritance?

• Reasoning is not necessary; selective breeding is purely observational.

• Reasoning helps in predicting which traits will be passed on to future generations.

• Reasoning is only used to determine the cost of selective breeding.

• Reasoning is used to identify the natural habitats of selectively bred organisms.

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How can a model be used to explain the genetic outcomes of sexual reproduction?

• By showing that offspring are identical to one parent.

• By demonstrating the combination of genetic material from two parents resulting in genetic variation.

• By illustrating that offspring have no genetic material from their parents.

• By depicting that offspring are identical to both parents.

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Which of the following best describes how environmental factors can influence the reproduction of a species?

• Environmental factors always lead to a decrease in reproduction rates.

• Environmental factors can determine which traits are advantageous, affecting which individuals are more likely to reproduce.

• Environmental factors have no impact on reproduction.

• Environmental factors ensure that all individuals reproduce at the same rate.

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