Unit 08: Investigating Interdependence Among Living Systems

How many organisms in this food web eat only producers? 

• 1
• 2
• 3
• 4

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Some students collected leaf samples. The students used the leaf identification key shown below to identify a leaf sample. Based on the identification key, which type of tree is this sample from?

• Ginkgo
• Honey locust
• Horse chestnut
• Black maple

Which organisms in the food web shown below compete for the same food source in this environment?

• Grasshoppers and snakes
• Hawks and frogs
• Frogs and snakes
• Decomposers and grasses

While exploring a lake in Argentina, Laguna del Diamante (Diamond Lake), scientists found rocks covered with mats made of photosynthetic microbes. Flamingos in the area filter the nutrient-rich microbes by pumpin the lakewater through their bill. What is the relationship between the photosynthetic microbes and the flamingos in the Laguna del Diamante ecosystem? 

• The microbes are parasites, and the flamingos are hosts.
• The mircrobes are carnivores, and the flamingos are predators.
• The microbes are herbivores, and the flamingos are carnivores.
• The microbes are produces, and the flamingos are consumers.

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Baleen whales eat zooplankton by taking a large amount of water into their mouth. These whales use special structures in their mouth to separate zooplankton from the water. Because baleen whales eat zooplankton, they are classified as __________. 

• producers
• predators
• parasites
• hosts

The Prairies Region adn the Cross Timbers are located in north-central Texas. The graph below shows information about eating habits of white-tailed deer in these regions. A Cross Timbers rancher is concerned about competition between the ranch animals and the deer. Based on the graph, which ranch animals compete for the most food with white-tailed deer?

• Cattle that eat grass and feed
• Goats that eat weeds and shrubs
• Turkeys that eat seeds and fruit
• Hogs that eat fruit, seeds, and feed

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

• 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 below, which two organisms have a predator-prey relationship?

• Shad and sturgeons
• Sturgeons and blue crabs
• Blue crags and rangia clams
• Copepods and amphipods

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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 below. 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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The food webs below model relationships among the organisms in two ecosystems. Which ecosystem would be more likely to survive if a disease killed the grass?

• The forest ecosystem, because most of the animals can eat othe organisms.
• The grassland ecosystem, because several predators compete for food
• The forest ecosystem, because it has three top predators
• The grassland ecosystem, because it has many herbivores

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