Ecosystem Review

Kudzu vines grow by climbing and wrapping around trees. Trees covered by kudzu can die because they are starved of sunlight. What type of relationship exists between the trees and the kudzu growing on them?

• Competition
• Mutualism
• Parasitism
• Cooperation

What happens to a population and to competition when there is a reduction of living space?

• The population expands and competition intensifies.
• Competition strengthens while the population contracts.
• The population increases as competition decreases.
• Competition weakens and the population decreases.

Which best determines the number of wolves that can live in an area?

• the amount of snow in the area each year
• the number of birds that live in the area
• the number of trees in the area
• the amount of food available in the area

If wolves prey on deer for food, what will most likely happen to the deer population if wolves are removed from an area where deer live?

• The population of deer will increase.
• The population of deer will decrease.
• The population of deer will remain the same.
• The population of deer will become extinct.

Which is an example of parasitism?

• cat and mouse
• tadpole and frog
• human and tapeworm
• caterpillar and butterfly

In the ocean, a sea anemone attaches itself to the shell of a hermit crab. The stinging arms of the sea anemone protect the hermit crab, while the movement of the hermit crab brings food to the sea anemone. Which best describes the relationship between the sea anemone and the hermit crab?

• commensalism
• parasitism
• mutualism
• cooperation

A wolf and a rabbit are an example of which ecological relationship?

• predator/prey
• cooperation
• mutualism
• parasitism

“Lions are predators to antelopes in many African ecosystems.” Which is best being described?

• a population shift
• the lion's niche
• a habitat
• an abiotic factor

Which are major abiotic factors that determine the types of plants that can grow in an ecosystem?

• birds and bees
• precipitation and bees
• precipitation and temperature

Which best describes biotic stress in an ecosystem?

• fungi damaging corn fields
• wildfires started by lightning burning a forest
• floods causing land degradation and soil erosion
• high salinity levels in local waters decreasing crop yield