G8 BIO 7 Bioenergetics

Which group of organisms is missing from the food web here?

• Carnivores

• Producers

• Heterotrophs

• Decomposers

Looking at the chart, what type of organism is the Alaskan brown bear?

• Carnivore

• Herbivore

• Omnivore

• Decomposer

Which of the following has the largest population in the Indian River Lagoon system?

• Crab

• Egret

• Flounder

• Phytoplankton

What is the primary source of energy for the ecosystem pictured here?

• Grass and green plants

• Hawks and deer

• Tadpoles and fish

• Sun

Observe the food chain below. What would be the result if a disease kills off most of the mouse population?

• All populations would be relatively unaffected.

• The grasshoppers would become extinct.

• The grasshopper population would decrease; the owl population would increase.

• The grasshopper population would increase and the owl population would decrease.

Which two organisms compete for the rabbit for energy?

• Mouse and tree

• Owl and goat

• Wildcat and jackal

• Lion and jackal

A new species of hawk that feeds on snakes was introduced to this ecosystem. What is going to happen to the kite population now that they are competing for snakes with the hawk?

• The kite population will increase.

• The hawks will have no influence on the population of kites because they have more food to eat.

• The kite will become better adapted to the environment.

• The kite population will decrease because they are now competing for food with the hawk

In this food web, which of the following organisms eats the largest variety of different producers?

• Mouse

• Grasshopper

• Dragonfly

• Butterfly

A student has set up an artificial ecosystem for a class project. This ecosystem has producers, first-level consumers, second-level consumers, and third-level consumers. By accident, a chemical enters the ecosystem and kills all of the first-level consumers. Which group(s) of organisms will most likely survive?

• Producers

• Secondary consumers

• Secondary and tertiary consumers

• Tertiary consumers

Which type of interaction exists between shrimp and blue crabs in this food web?

• Blue crabs prey on shrimp.

• Shrimp compete with blue crabs for food.

• Shrimp help blue crabs filter polluted water.

• Shrimp decompose matter for blue crabs.