Module 3 Yr 11 biology

the variety of life in the world or in a particular habitat or ecosystem

• biodiversity

• demography

• carrying capacity

• poaching

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a species that is not native to a particular region

• endemic

• exotic

• endangered

• extinct

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

• endemic

• exotic

• endangered

• extinct

a species at risk, but not yet endangered

• endangered

• exotic

• endemic

• threatened

Why is biodiversity important to ecosystems?

• It helps populations adapt to ecological changes.

• It increases at each level of the food chain.

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Currently sharks are on a rapid decline due to overfishing. If sharks go extinct will this affect the biodiversity of the ocean?

• No, sharks are not important.
• No, sharks will only affect the seal populations.
• Yes, it will disrupt the entire food chain in the ocean.
• Yes, but only a little.

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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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What factor contributes most to the sustainability of a habitat?

• Competition between large predators

• Large variety of organisms

• Presence of volcanic rock

• Absence of bacterial species

Over time, scientists are predicting the Baltic Sea to become less salty. As a result, there will be less biodiversity. Which best explains why the biodiversity of the Baltic Sea would decrease?

• Fewer types of plants and animals are found in warm water than in cool water.

• Plants and animals adapted for living in saltwater will grow more slowly in water that has less salt.

• Plants and animals adapted for living in saltier conditions will not be able to survive and reproduce.

• Animals adapted for living in warm water will eat all the plants and animals adapted for living in cool water.

Which of the following is a description of an abiotic factor that makes up part of a desert habitat?

• Sparse growth of cottonwood trees.

• Extremes of day and night temperatures.

• Few large predators, such as coyotes

• Leafless, waxy-coated plant with sharp spines.