Exam 3: Ecosystems: What Are They and How Do They Work

When organisms die, their nitrogenous organic compounds are converted to simpler inorganic compounds such as ammonia through the process of

A grassy meadow high in the Sierra Nevada Mountains is known to support a variety of organisms. a.During the summers when grass is thick and lush, and wildflowers abound, butterflies take advantage of the abundant nectar source. a.Bears graze on the berries in shrubs at the edge of the meadow. a.Deer also forage at the edge of the meadow. a.In the early mornings, coyote are known to prey on the squirrel and mouse population that burrow into the meadow soil. a.A variety of birds prey on the butterflies and other insects such as bees and wasps. -The coyotes would be classified as

Match the items listed below with the appropriate choice -On the figure of the hydrological cycle, choose the letter that represents evaporation.

The form of nitrogen most usable to plants is

Of the total energy that falls on their leaves, what percent do producers on average convert to chemical energy through the process of photosynthesis?

Match the descriptive phrase below with its appropriate cycle. -Fixation into soil accomplished by bacteria and algae

Which of the following ecosystems has the highest net primary productivity?

Which animal consumes energy from the highest number of links in the food web? Name a possible problem that this animal could be subjected to that others in the food web do not risk.

Which statement(s) describes field research most accurately?

Bacteria are more important in the ____________________ than in the carbon or phosphorous cycle.

Ecology is the study of connections in the natural world.

A(n) ____________________ consists of members of the same species living in the same area.

The study described above is best categorized as

All of the following are abiotic factors except

Match the items listed below with the appropriate choice -On the generalized structure of the Earth figure, choose the letter of the layer that consists of the Earth's crust and upper mantle.

Match the descriptive phrase below with its appropriate cycle. -Affected by burning coal

Denitrification is an important natural process carried out by bacteria.

Nitrogen makes up approximately ____% of the volume of the atmosphere.

Increasing levels of carbon dioxide are one of the major contributors to global warming.

Another word for consumer is ____________________.