Exam 17: Communities and Ecosystems

Hover flies like to drop in at outdoor picnics to sample the sweets, but the reaction of humans is to flee the scene because of the flies' uncanny resemblance to bees. Thus the survival of Hover flies is enhanced by

Which of the following is a major determinant in which plant species becomes a pioneer species in a primary succession event?

How are parasitoids different than parasites?

Which gas is increased in the atmosphere and amplifies the green house effect?

Most of the water vapor in the earth's atmosphere comes from evaporation from

Nitrogen is released into the atmosphere by

Phorid flies lay their eggs inside the bodies of various insects and spiders. When the larvae hatch they consume the body of the 'host' from the inside out. The phorid fly is an example of

An array of organisms together with their physical environment is which of the following?

Energy flow in an ecosystem is

Which of the following statements is FALSE?

Structure of communities may be affected by

In an energy pyramid, which of the following represents the base, the largest part of the pyramid?

Populations are held in check by

Considering the traditional view of ecological succession, which of the following plants would most likely be a pioneer species in a primary succession event?

The plants and animals now present on acreage from which the trees were removed ten years earlier represent

Which of the following is an adaptation against predation?

A Venus fly trap's niche in an ecosystem is as a _______.

The first plant to colonize the plains of Mt St Helens after this volcano erupted in 1980 was a prairie lupine. The prairie lupine is an example of

Carbon dioxide is a pollutant because it