Biodiversity Questions

High biodiversity makes the food web more complex and better able to support the most species, even if some populations decrease.

• True

• False

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A species that plays a critical role in the health, maintenance, growth, or definition of an ecosystem.

• keystone

• invasive

• engineer

• predator

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Why are some sharks considered a keystone species?

• Because they are a top predator

• They scare off smaller fish that may overgraze an area of sea grass

• They are tertiary consumers

• They are cartilaginous

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Which one of the following keystone examples play a vital role in the health of coastal kelp forests?

• starfish

• sea otters

• beavers

• wolves

• elephants

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The level of biodiversity that involves a variety of habits and communities is _____ diversity.

• ecosystem

• population

• genetic

• species

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Define genetic diversity

• variation of genes within a species or population in a given area

• variety of ecosystems in a given area

• system made up of all the living and nonliving things in a given area

• disturbance in the environment conditions that cause genetic changes to occur in organisms

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species that are native to and found only within a limited area

• endemic

• exotic

• endangered

• extinct

Where are many critical biodiversity hotspots located?

• islands, tropical rain forests, and coastal areas

• cities and developed areas of the world

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The lionfish is a venomous fish found primarily in the Red Sea and the Indian Ocean. In the 1990s, lionfish were accidentally released into the Atlantic Ocean, where they found abundant resources and favorable environmental conditions. Which of the following scenarios is most likely to result in the lionfish having a major impact on the communities into which they were introduced?

• With no natural predators, the lionfish population will become very large.

• Some native species of invertebrates will develop a resistance to lionfish venom.

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How can humans best help an endangered species avoid extinction?

• they can feed the animals

• they can put the animals in a zoo

• they can protect the animal’s habitat

• they can take the animal to new habitats

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