APES Quiz 1.1

What is similar about the paths that energy took through the ecosystem?

• They all have the same animals

• All the paths have energy from the moon

• They all begin with the sun

• They all end with the sun

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What is an ecosystem?

• The area of land where animals live

• A community of insects that work together

• A community of organisms together with its environment

• The section of a terrarium where plants grow

An organism that makes its own food for energy

• consumer
• predator
• prey
• producer

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A life form that is very sensitive to environmental changes in its ecosystem. They can give us early-warning messages that a habitat is suffering.

• Indicator Species

• Flagship Species

• Predators

• Ecosystem Engineers

Otters prey on sea urchins. Sea urchins eat kelp. Kelp is home to many animals. What would happen if there were no more otters?

• The sea urchin population would die out

• The kelp population would become larger

• The homes of many animals would be destroyed by sea urchins

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Which is one example of the role of humans as a keystone species?

• Humans can adapt to their environment

• Humans turn habitats of some species into farrmland

• Humans have dogs and cats as pets

Based on the graph shown, how can you tell sea otters are a keystone species?

• as the sea otter population decreases, biodiversity increases
• as sea otter population increases, biodiversity increases
• changes in the sea otter population have little effect on biodiversity 
• the sea otter population dereases due to the presence of urchins

Which factor promotes competition between organisms in an ecosystem?

• cycling of minerals

• limited resources

• decomposition of organic matter

• presence of saprophytes

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As the population of prey decreases, the population of the predator which eats it will...

• Increase
• Decrease
• Remain Constant

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Predator population lags behind prey population because:

• Increase in predators leads to decrease in prey

• Increase in predators leads to increase in prey

• Increase in predators leads to decrease in producers

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