Exam 42: Ecosystems

Which cycle relies most heavily upon bacteria?

Detritus specifically includes ____.

Match the trophic category to the correct statement. The trophic categories may be used once, more than once, or not at all. -an earthworm functions as this

Oil and natural gas formed over hundreds of millions of years from the carbon-rich remains of which organisms?

Carnivores must be at or above which trophic level?

Biological magnification can be defined as the ____.

Animals obtain minerals such as phosphorus primarily through ____.

Some energy gets stored in molecules that most consumers cannot break down. For example, most carnivores cannot access energy tied up in bones, scales, hair, feathers, or fur. What effect does this have on energy transfer in an ecosystem?

Plants are able to take up and use nitrogen only when it is available in what form(s)?

Which organisms would be part of a grazing food chain but not a detrital food chain?

What is the major reservoir of phosphorus?

Primary production is the ____.

Match the trophic category to the correct statement. The trophic categories may be used once, more than once, or not at all. -most mushrooms function as this

The ____ cycle is a sedimentary cycle.

Energy flow in an ecosystem is ____.

Match the trophic category to the correct statement. The trophic categories may be used once, more than once, or not at all. -a bear feeding on a salmon is functioning as this

Wastes would accumulate and most nutrients would stop cycling in the absence of ____.

Primary consumers eat ____.

An ecosystem is a community of ____ producers and ____ consumers that interact with one another and with their nonliving environment.

The bottom or base of an energy pyramid consists of ____.