Texas Life Science TEKS

A food chain in an ecosystem includes blackberry bushes, deer, and wolves. (Deer eat blackberries, wolves eat deer). If the population of wolves decreases, how will this affect the population of blackberry bushes?

• It will decrease because there will be fewer deer

• It will increase because there will be fewer deer

• It will decrease because there will be more deer

• It will increase because there will be more deer.

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NGSS.MS-LS2-1

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What would most likely result if all plants in an area were destroyed?

• Consumer populations would increase because more sunlight would reach the ground

• Decomposer populations would increase because more sunlight would reach the ground

• Consumer populations would decrease because plants provide them with water

• Consumer populations would decrease because pants provide them with energy

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NGSS.MS-LS2-1

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NGSS.MS-LS2-4

What will be the most affected if the decomposers in an ecosystem are removed?

• spread of disease

• availability of water

• quality of the soil

• distribution of organisms

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NGSS.MS-LS2-1

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A mouse eats seeds and insects. Which best describes the role of the mouse?

• consumer

• decomposer

• herbivore

• producer

Which would most likely cause a decrease in a population of herbivores?

• an increase in producers

• a decrease in decomposers

• an increase in plants

• an increase in carnivores

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NGSS.MS-LS2-1

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Which type of animal usually eats both producers and consumers?

• omnivores

• carnivores

• herbivores

• predator

Which classification best describes herbivores?

• producers

• consumers

• predators

• decomposers

Which has the greatest effect on the amount of salt in a salt marsh?

• the number of animals living in the marsh

• the closeness of the marsh to the ocean

• the depth of the water in the marsh

• the temperature of the water in the marsh

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NGSS.MS-LS2-4

A partial ocean food web is shown. Which statement correctly describes the transfer of energy in a food chain in this food web?

• Energy is transferred from phytoplankton to zooplankton to tuna.

• Energy is transferred from phytoplankton to zooplankton to herring.

• Energy is transferred from gannets to sardines to zooplankton.

• Energy is transferred from sardines to zooplankton to phytoplankton.

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NGSS.MS-LS2-3

A partial food web from a woodlands ecosystem is shown. How many organisms in this food web obtain energy directly from producers?

• 1

• 2

• 3

• 4

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NGSS.MS-LS1-6

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