Food Web STAAR

Many Texas caves provide a habitat for animals that live in total darkness. The caves are damp and cool, and most of the caves are rich in mineral calcite. The diagram below shows the relationships of some organisms involved in a cave ecosystem. Based on the diagram, which of the following statements is valid?

• Owls are predators of bats, and bats are predators of moths.

• Beetles compete with bats and cave spiders.

• Snakes prey on bats and owls.

• None of the above

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The partial food web shown below is found in an aquatic environment. This type of environment has many organisms in the same trophic levels. Which two types of organisms in this aquatic food web have a producer-consumer relationship?

• microscopic algae and white suckers

• small invertebrates and amphipods

• phytoplankton and mummichogs

• amphipods and channel catfish

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How many predators shown in this food web are omnivores?

• 1

• 2

• 3

• 4

Which of these correctly describes a relationship between organisms in the soil food web?

• protozoa get nutrients from small arthropods

• mammals are predators of birds

• nematodes prey on arthropods

• bacteria get nutrients from organic matter

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In the aquatic food web shown in the picture, which two organisms have a predator-prey relationship?

• shad and sturgeons

• sturgeons and blue crabs

• blue crabs and rangia clams

• copepods and amphipods

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How many organisms in this food web eat only producers?

• 1

• 2

• 3

• 4

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A chart lists organisms in five different categories living near the Texas Gulf Coast.

Based on the chart, which food chain best models a flow of energy in this ecosystem.

• 
• 
• 
• 

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Which organisms all consume the same producer?

• crabs, pilchards, blennies

• euphausiids, sweeps, water fleas

• tiger sharks, dolphins, octupuses

• sea urchins, crabs, octopuses

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The flow of energy in some Australian food chains is modeled in the energy pyramid in the picture.

Based on the model, which consumers would receive the greatest amount of energy captured by the producers in their food chains?

• wedge-tailed eagles

• chuditch

• ring-tailed opossums

• eucalyptus trees

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The African savanna is a grassland scattered with shrubs and small trees. Some of the organisms that live in the savanna are shown.

Which two types of organisms have a producer-consumer relationship in this African savanna?

• zebras and hyenas

• hyenas and cheetahs

• trees and elephants

• fungi and dung beetles

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