Unit Test — Unit test Answers

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A zebra is killed and eaten by a lion.

A disease wipes out several plant species.

A frog lays hundreds of eggs that hatch into tadpoles.

A dry season causes a few small trees to die.

Which substance is considered a building block for all living things?

hydrogen

glucose

carbon

protein

Which of the following is an effect of global warming?

falling sea levels

decrease in the acidity of seawater

heavier rainfall and flooding

health improvements

Which is a disadvantage of captive breeding?

rarely successful

harmful to many animals

usually results in overpopulation

often expensive

What would most likely happen to life on Earth if the carbon cycle stopped?

Life would continue unchanged.

Life would cease to exist.

Only plants would be affected.

Only animals would be affected.

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