Exam 36: Ecosystems

Which zone in a lake is the shallowest part?

The type of ecosystem that can be found bordering the tropics worldwide that is characterized by huge herds of grazing animals is:

In the annual cycle of a temperate lake,thermal stratification occurs when?

Describe the environmental water cycle.

All of the following are examples of detritivores except:

Circling the globe at northern latitudes is ____________,with coniferous trees and long,cold winters.

The tropics are warmer than the temperate regions because:

Characterized by permafrost and low,shrubby plants,_______ can be found nearest the poles.

Plants are the ____________ in the food chain in an ecosystem.

If forests are cut down,semiarid deserts could result.

Certain bacteria are capable of transforming atmospheric nitrogen into a form other organisms can use through a process known as:

Uncontrolled growth of algae in an aquatic ecosystem is due to a process known as ________________,caused by excessive inputs of nutrients.

When you eat a hamburger,you are eating at which trophic level?

The moisture that travels up from the plants into the atmosphere falls back to the Earth as rain.

The community plus its habitat make up an ____________________.

All of the following are correct about oligotrophic lakes except:

Which of the following is NOT a component of the physical habitat in which organisms live?

Phosphorus is an essential element in all living things and is a component of:

The loss of _____ that occurs at each trophic level places a limit on how many top-level carnivores a community can support.

Life exists on Earth because of the constant flow of light energy from the Sun that is transformed into chemical energy.