Ecology Review #2

A food chain can go on for seven or eight levels. (a)  

• True
• False

A food chain is a diagram that shows feeding interactions in an ecosystem through a single pathway.

• True

• False

The first trophic level always consists of

• Producers

• secondary consumers

• tertiary consumers

• primary consumers

A food web contains many intersecting food chains.

• True

• False

Which level is known as the producer level?

• The first

• The second

• The third

• The fourth

Energy is recycled in a food chain.

• True

• False

The ecological pyramid depicts how biomass and energy increase from lower to higher trophic levels.

• True

• False

When the niche of a species at the top of the food chain impacts multiple species in preceding levels this is called

• succession

• trophic cascade

• evolution

• a climax community

Select all that apply:

The wolves in Yellowstone National Park affect which of the following?

• Biodiversity

• Hydrology of the rivers and streams

• The geography of the ecosystem

• The size of the bear population

Anything that limits an organism's ability to survive in an ecosystem is referred to as a

• limiting factor

• community

• population

• symbiotic relationship