Food Webs

Front

Which group is not represented in the food web?

• producers
• primary consumers
• secondary consumers
• decomposers

Back

decomposers

Front

What do the arrows in the food chain indicate about the flow of energy in an ecosystem?

Back

Energy flows in one direction in an ecosystem, from producers to consumers.

Front

In this energy pyramid, which organism would most likely be in level 2? Options: bird, fox, caterpillar, tree

Back

caterpillar

Front

In this energy pyramid, which organism would most likely be in level 2? Options: bird, fox, caterpillar, tree

Back

caterpillar

Front

What is true of grass in an ecosystem?

Back

It produces glucose from carbon dioxide and water.

Front

How would the removal of earthworms from the food chain affect the other organisms?

Back

The number of crayfish will decrease.

Front

What is the source of energy for the algae in an aquatic food web for a stable lake ecosystem in Connecticut?

Back

sunlight

Front

Suppose that a new predator of the rabbit migrated to this ecosystem. What is the most likely initial effect on the other organisms?

• More competition among the mice for food
• More competition among the hawks for food
• Less competition among snakes for food
• Less grass available for food

Back

More competition among the hawks for food

Front

For the food chain shown, which change would have the most severe consequences? Options: a drastic decrease in rainfall, causing a drought; the poaching of predatory hawks by game hunters; the introduction of a second predator that eats field mice; a parasitic infestation that reduces the cricket population.

Back

a drastic decrease in rainfall, causing a drought

Front

In the marine food chain diagram, the zooplankton are classified as:
- primary producers
- primary consumers
- secondary consumers
- tertiary consumers

Back

primary consumers