Exam 18: Communities and Ecosystems

The greatest concentration of nitrogen on Earth is found in ____.

In this figure, what do the yellow arrows marked #1 and #2 indicate?

In the simplified prairie food chain illustrated by the following pictures, the letter C represents a ____.

How do red imported fire ants threaten the Texas horned lizard?

Most of the Earth's phosphorous is in the form of ____.

The relationship between the yucca plant and the yucca moth that pollinates it is best described as  ____.

A community refers to ____.

RIFAs are a(n) ____ species.

In a natural community, the primary consumers are ____.

An aquifer is most closely related to ____.

In the simplified prairie food chain illustrated in the following pictures, the letter D represents ____.

The warming action on Earth's atmosphere is referred to as ____.

Red imported fire ants (RIFAs) disrupt natural communities by ____.

Species richness and the relative abundance of each species determine ____.

The first plant to colonize the plains of Mount Saint Helens after this volcano erupted in 1980 was a prairie lupine. The prairie lupine is therefore an example of ____.

This image shows an area in which a glacier has melted. What is indicated by the number "2"?

Competitive exclusion is based upon the idea that ____.

Which is an example of an event that would give rise to primary succession?

An energy pyramid is ____.