04.01 Ecology

What list describes the diet of an omnivore?

Fish and berries

Which statement describes the relationship between the deer and the bear on the food web? Tree is consumed by insect, which is consumed by the frog and lizard. The frog and lizard is consumed by the snake and the snake is consumed by the hawk. The mayfly is consumed by the fish and the fish is consumed by the bear. The plants are consumed by the deer and bear. The deer is consumed by the wolf.

Heterotrophs compete for the same food source.

What problems would you expect to observe in an ecosystem without primary consumers?

If there were no primary consumers in the ecosystem, there would be a decrease in secondary consumers. The secondary consumers would start to die, because they wouldn't get enough nutrients, and there would be an increase in primary producers.

Which statement describes the role of the organism indicated by the blue arrow in the food web? Food web showing several different food chains. The blue arrow is pointing to an image of grass which is eaten by a wood duck and meadow vole. The wood ducks and meadow vole are then eaten by red-tailed hawk.

Producers bring energy into the ecosystem by making organic molecules from sunlight or chemical compounds.

Why are producers important to energy transfer within an ecosystem?

Producers make food for other organisms to consume. This gives the organisms energy and nutrients they need to live.

What trophic level does the lizard fill in the food web? Tree is consumed by insect, which is consumed by the frog and lizard. The frog and lizard is consumed by the snake and the snake is consumed by the hawk. The mayfly is consumed by the fish and the fish is consumed by the bear. The plants are consumed by the deer and bear. The deer is consumed by the wolf.

Secondary consumer

What would happen in an ecosystem without primary consumers?

The populations of producers would increase.

Which statement correctly describes the transfer of energy between the blue arrows? Food pyramid showing plants at the bottom level. Insects and snails are in the second ascending level. The small fish are in the third ascending level. Larger fish are in the fourth ascending level. The top level has a hawk. The blue arrows are pointing to the third and fifth (top) level of the pyramid.

There is a loss of energy.

How do decomposers convert energy for an ecosystem?

They convert dead organic compounds into reusable organic compounds.

What food chain is represented in the above food web? Food web showing images of living organisms. The images of each organisms has an arrow pointing to an image of another organism. The tree has an arrow pointing to an insect. The insect has arrows pointing to a frog and lizard. The frog and lizard have arrows pointing to a snake and the snake has an arrow pointing to the hawk. There is a picture of a mayfly that has an arrow point to a fish and the fish has an arrow pointing to the bear. The image of plants has arrows pointing to a deer and bear and the deer has an arrow pointing to a wolf. All organisms have an arrow pointing to mushrooms.

tree > insect > frog > snake > hawk