Section 2.1 Ecosystems and Lab Quiz

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The drawing above can be best described as a

food chain

food web

pyramid of biomass

pyramid of numbers

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The tertiary consumer above is

the elk

the insects

the weasel

the lynx

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which of the following is a primary consumer

grass

owl

mice

snake

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which of the following is a detrivore?

eagle

beetle

rabbit

grass

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What is the best reason for why an ecosystem supports fewer organisms at higher trophic levels than at lower trophic levels?

Competition among organisms is more intense at higher trophic levels.

Most of the food energy consumed is used for growth and to increase biomass.

Animals are part of more than one food chain and eat more than one kind of food.

There is a huge decrease in energy from lower trophic levels to higher trophic levels.

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At the producer level of a food pyramid, there is 455 000 kcal/m2 of energy available. If there is a 90 percent energy loss at each level, how many kilocalories will be incorporated into the bodies of the secondary consumers?

455 kcal/m2

4550 kcal/m2

45 500 kcal/m2

500 500 kcal/m2

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If the squirrels in the ecosystem are removed

foxes will increase

owls would increase

plants would decrease

rabbits would decrease

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The drawing above shows a food chain

If many hawks were killed, then

the snakes would increase

the caterpillars would increase

the grass would decrease

nothing would happen to the populations of the other organisms

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In a pyramid of biomass

the primary producers have the least mass

the tertiary consumers have the most mass

the mass of the primary consumers exceed the mass of the secondary consumers

the omnivores have the most mass

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Observe the picture above: molar teeth, incisor teeth and eyes on the side of a skull. This best describes the skull of a

cougar

human

rat

rabbit

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The animal above has adaptations which allow it to fly. Which of the following are NOT one of those adaptations

double pectoral muscles

hollow bones

blood with no nucleus

lungs with extra sacs

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The image above is most likely a skull of a

cougar

rat

rabbit

chicken

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Which of the following is an example of a primary producer

squirrel

raccoon

mushroom

tree

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