Unit 2 Ecosystems Study Guide

What impact do resources, such as availability of food, sunlight, and water, have on an ecosystem?

• They limit the carrying capacity

• They increase habitat areas

• They decrease the number of diseases

Large algal blooms on the surface of a lake keep which abiotic factor from reaching the bottom?

• water

• light

• oxygen

As an insect population decreases, which would most likely also decrease?

• hawk population

• grass population

• frog population

The following is a food chain observed in a large wilderness park:

Vegetation----->Deer----->Cougar

• The prey will decrease in numbers

• The predator will increase in numbers

• The predator and prey numbers will be unaffected

Which type of interaction causes harm to one organism?

• parasitism

• mutualism

• commensalism

Cattle egrets and cattle exist in a commensalistic relationship. Which best describes WHY they can coexist in the field?

• The cattle depend on the egrets as a food source

• The cattle and the egrets compete for food

• The cattle and the egrets consume different food sources

Which term BEST describe two predators living in the same habitat who feed on the same prey?

• coexistence

• competition

• mutualism

Which BEST represents the niche of phytoplankton and algae in a marine ecosystem?

• producers

• scavengers

• decomposers

Kudzu vines grow by climbing and wrapping around trees. Trees covered in kudzu can die because they become starved of sunlight. What type of relationship exists here?

• mutualism

• parasitism

• predation

Which best explains cooperation?

• A colony of ants working together to build an ant colony.

• a butterfly getting nectar from a flower

• male deer fighting for territory