Biodiversity Quiz 3

What term describes the variety of different organisms found in an ecosystem?

• population

• biodiversity

• ecosystem services

Answer explanation

The term that describes the variety of different organisms found in an ecosystem is biodiversity. Biodiversity refers to the wide range of species, including plants, animals, and microorganisms, that exist in a particular habitat or ecosystem. It is important to maintain biodiversity as it contributes to the overall health and stability of ecosystems, providing various ecosystem services such as pollination, nutrient cycling, and pest control.

Biodiversity refers to

• extinct species

• the variety of species on Earth

• nonrenewable resources

• the rate of species decline

Answer explanation

Biodiversity refers to the variety of species on Earth. It is the total number of different species of plants, animals, and microorganisms in a given area. Biodiversity is important because it contributes to the stability and resilience of ecosystems, as well as providing numerous benefits to humans, such as food, medicine, and clean water. The correct choice is 'the variety of species on Earth'.

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 Which biome is more likely to survive a change in the environment?

• High (rich) biodiversity

• Low (poor) biodiversity

Answer explanation

A biome with high (rich) biodiversity is more likely to survive a change in the environment. This is because a diverse ecosystem has a greater variety of species, which increases its resilience and ability to adapt to changes. In contrast, a biome with low (poor) biodiversity has fewer species and is more vulnerable to disturbances. Therefore, the correct choice is 'High (rich) biodiversity'.

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High biodiversity not only helps the stability of Yellowstone National Park, but also makes it more

• resilient

• reliant

• fragile

• unstable

Answer explanation

High biodiversity not only helps the stability of Yellowstone National Park, but also makes it more resilient. The presence of diverse species ensures that the ecosystem can withstand disturbances and adapt to changes. This resilience is crucial for the long-term survival and functioning of the park. The option 'resilient' accurately describes this ability of biodiversity to enhance the park's stability and adaptability.

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Large populations with high genetic diversity are

• more likely to go extinct

• more likely to be invasive

• less likely to go extinct

• less likely to be invasive

Answer explanation

Large populations with high genetic diversity are less likely to go extinct. This is because genetic diversity allows populations to adapt to changing environments and increases their chances of survival. In contrast, populations with low genetic diversity are more vulnerable to diseases, environmental changes, and other threats, making them more likely to go extinct. Therefore, the presence of high genetic diversity in large populations provides them with a greater resilience and reduces the risk of extinction.

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Which of these are a keystone species of a kelp forest?

• The kelp

• The sea otter

• The sea urchin

• All 3 are keystone species

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How would scientists describe the biodiversity of a kelp forest?

• Low

• High

• Intermediate

• Variabl

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Which of these are a keystone species of a kelp forest?

• The kelp

• The sea otter

• The sea urchin

• All 3 are keystone species

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Why does it matter that cold waters rise to the surface with many nutrients in a kelp forest?

• Because it creates a warmer environment for kelp growth.

• Because it decreases the population of marine species.

• Because it supports large populations of many marine species.

• Because it causes harmful algal blooms.

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What is extirpation?

• The process of introducing a new species into an ecosystem

• The migration of a species to a different habitat within the same ecosystem

• The adaptation of a species to changing environmental conditions

• When all the members of a population in an ecosystem die and the species no longer exists in that place

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