Genetic Diversity & Population Survival

Scientists were analyzing DNA samples taken from a population of humans. In their study, they focused on the genes that coded for eye color. Scientists discovered many different types of genes that coded for this trait. Which of the following describes the focus of their research?

• ecosystem diversity

• genetic diversity

• species diversity

• molecular diversity

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A group of scientists visited the Amazon rainforest to identify the different types of plants living within the southern part of the forest. Which of the following describes the focus of their research?

• ecology diversity

• species diversity

• ecosystem diversity

• genetic diversity

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Which of the following is an example of biodiversity at the genetic scale?

• The different types of reptile species living in the desert.

• The different types of habitats that can be found in Africa.

• The various species of tree frogs living within a rainforest ecosystem.

• The differences between individuals in one species.

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An ecosystem contains blue whales, sea otters, giant kelp, and various species of phytoplankton. What type of biodiversity is being described?

• Genetic diversity.

• Ecosystem diversity.

• Species diversity.

• Trait diversity.

Read the statement. Biodiversity can be described using various scales. Which of the following can be used to describe biodiversity? Choose all that apply:

• Genetic

• Ecosystem

• Individual

• Species

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Which of the following suggests how to achieve true ecosystem diversity? Select one:

• Have an area with distinct habitat types and a variety of species found there.

• Have a stable climate that supports large population sizes of plants and animals.

• Have a large supply of resources that can support multiple food chains during all seasons.

• Have minimal human and environmental disruptions so that new organisms can move in.

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When humans cause an environment to quickly change (through deforestation, climate change, etc.), what effect does it have on species biodiversity?

• Species biodiversity increases as less species become extinct.

• Species biodiversity decreases as less species become extinct.

• Species biodiversity decreases as more species become extinct.

• Species biodiversity remains the same.

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How does deforestation lead to the extinction of species?

• It destroys the habitats organisms need to survive.

• It results in fewer offspring by altering mating behaviors.

• It reduces the amount of oxygen in the atmosphere.

• It increases the number of predators found in the area.

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Which of the following is an example of geographic isolation?

• A fence separating a parrot population and a toucan population.

• A river separating a population of ants into two separate populations. The two separate populations become different species over time.

• A dog being kept in a kennel while its owners are on vacation.

• A population of crabs migrating to colder waters and starting their mating season.

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Why are complex ecosystems less likely to experience species extinctions due to climate change than simpler ones?

• They produce much more oxygen, which supports a greater number of producers.

• Other organisms can step up to fill in the voids created by lost species.

• They have many more predators that will keep the prey populations in check.

• New species are more likely to move to reduce the impact of lost species.

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