Human Impact & Ecosystem Interactions

1. What are renewable resources?

• resources that are used faster than they form

• resources that can replenish themselves over time

• resources that formed over millions of years

• resources that exist only in rural areas

How might an introduced plant species kill native plant species?

• Its rapid growth can deprive native plants of sunlight and resources.

• Its rapid growth can deprive native plants of competition.

• It can cause soil loss from erosion.

• Its rapid growth can deprive native plants of oxygen.

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What is one of the greatest threats to biodiversity on Earth?

• habitat destruction

• loss of drinking water

• hunting

• pollination

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Why might an introduced animal species overrun native species in an ecosystem?

• Its population size is smaller than those of native species.

• It is more energy efficient, so it eats less food.

• It is a predator of the native species.

• It often has no natural enemies so it can multiply quickly

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A pride of lions stalks, tackles, and kills an antelope. Which is best being demonstrated?

• predation
• mutualism
• cooperation

How does eutrophication cause the death of aquatic organisms

• the build up of carbon dioxide in the water

• the lack of nitrogen in the water

• the lack of carbon dioxide in the water

• the lack of oxygen in the water

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How can an algal bloom (eutrophication) lead to a decrease in dissolved oxygen? Select all that apply.

• Algae is a heterotroph and consumes more oxygen than it produces.

• Decreased light penetration limits photosynthesis below the surface.

• Bacteria consume oxygen as they decompose dead algae and other organisms.

• Decomposes that would have produced oxygen are outcompeted by algae.

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The carrying capacity of an environment for a particular species at a particular time is determined by the

• number of individuals in the species.
• distribution of the population.
• reproductive potential of the species.
• supply of the most limited resources

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As a population grows, it will most likely stop growing at what size?

• Growth limit
• Exponential limit
• Carrying Capacity
• It won't stop growing

A population is...

• A group of one species in one area
• Multiple species that live in one area
• All of the living and nonliving things in an area
• None of these