Unit 3 Test 2 Concepts 3-5

In the food web to the right, the insectivorous birds would be classified as

• carnivores.

• decomposers.

• herbivores.

• omnivores.

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NGSS.MS-LS2-2

In the food web to the right, what would be a direct impact of an increase in the amount of toads in the ecosystem?

• an increase in the population of squirrels

• a decrease in the population of owls

• an increase in the population of snakes

• a decrease in the rabbit population

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Organisms that use energy from the sun to make their own food are called

• detritivores.

• consumers.

• omnivores.

• producers.

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What will MOST LIKELY happen if a new producer is introduced into a food web?

• The omnivores will decrease.

• The herbivores will increase.

• The carnivores will decrease.

• The decomposers will decrease.

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The figure to the right shows a trophic pyramid for an ecosystem. What happens to the amount of energy in the pyramid as it moves up through the different levels?

• Energy increases by 10% each level

• Energy decreases by 90% each level

• Energy decreases by 10% each level

• Energy increases by 90% each level

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NGSS.MS-LS2-3

In food chains, the flow of energy is ALWAYS ________.

• one-way

• reversible

• two-way

• uncontrolled

The following organisms make up a food chain: algae → fish → bear. If you were to place the bear into the trophic pyramid to the right, the bear would go on level _____ and have ______ amount of energy available to it.

• A; the least

• C; the least

• A; the greatest

• B; an intermediate

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NGSS.MS-LS2-3

Which of the following defines heterotroph and autotroph correctly, along with an example of each?

• Heterotrophs are organisms that produce their own food; examples include plants. Autotrophs consume other organisms for energy; examples include animals.

• Heterotrophs consume other organisms for energy; examples include animals. Autotrophs are organisms that produce their own food; examples include plants.

• Heterotrophs and autotrophs both produce their own food; examples include fungi and algae.

• Heterotrophs and autotrophs both consume other organisms for energy; examples include bacteria and humans.

The purpose of photosynthesis is to

• make ATP for humans.

• build proteins in plants.

• store solar energy as sugar.

• A and C

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NGSS.MS-LS1-6

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In which organelle does photosynthesis occur?

• Mitochondria

• Chloroplast

• Lysosome

• Nucleus

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