11/12 Review Biology

Which animals in the community would be classified as an herbivore?

• hawks

• grasshoppers

• spiders

• snakes

Which type of model gives the most complete representation of the feeding relationships within a community?

• a food chain

• a food web

• predator-prey association

• a material cycle

What is the significance of the arrow between the trees and the deer in the food web?

If the population of mice is reduced by disease, which change will most likely occur in the food web?

• The cricket population will increase

• The snake population will increase

• The deer population will decrease

• The grasses will decrease

What is the original source of energy for this food web?

• The sun

• Chemical bonds in sugar molecules

• Enzymatic reactions

• chemical reactions in bacteria

What is the role of bacteria and fungi in an ecosystem?

The accompanying graph provides information about the population of deer in a given area between 1900 and 1945.

Which statement identifies the most likely reason that the carrying capacity of the area to support deer decreased between 1925 and 1930?

• The deer population decreased in 1926

• The number of predators increased between 1915 and 1925.

• The deer population became too large.

• An unusually cold winter occured in 1918

An environment can only support as many organisms as the available energy, oxygen, and minerals will allow. Which term is best described by this statement?

• biological feedback

• carrying capacity

• homeostatic control

• biological diversity

One biotic factor that limits the carrying capacity of any habitat is the

• availability of water

• activity of decomposers

• level of atmospheric oxygen

• amount of soil erosion

Organisms cannot produce populations of unlimited size because

• the resources on earth are finite.

• there is no carrying capacity on earth.

• species rarely compete with each other.

• interactions between organisms are unchanging