Community and Populations

If you count 25 beetles living in an area of 5 square meters, the population density would be __________

• 25 beetles per square meter
• 5 beetles per square meter
• 4 beetles per square meter
• 20 beetles per square meter

An organism's particular role in a habitat, or when and how it survives, is called its __________

• carrying capacity
• ecosystem
• competition
• niche

A hawk building its nest on the arm of a cactus is an example of ________

• commensalism
• mutualism
• parasitism
• predation

The struggle between organisms to survive in a habitat with limited resources is called ______________

• competition
• predation
• symbiosis
• parasitism

Population density is ___________

• an approximation of a number, based on reasonable assumptions
• the number of individuals of a population in a specific area
• the number of individuals moving into a population
• the smallest level of an ecosystem

Which of the following is an example of a population?

• cats and dogs in your neighborhood
• bushes and grass in a park
• the rocks in a rock collection
• gray wolves in a forest

Both species benefit in the type of symbiosis called ______________.

• parasitism
• mutualism
• commensalism
• predation

Population size generally increases if the BIRTH RATE is ____________ the DEATH RATE.

• greater than
• less than
• the same as

What factor(s) could limit the growth of a prairie dog population?

• predators
• lack of prey
• space
• all of the above

If food is scarce, an antelope herd may leave its current grassland habitat for another one that has more food. This is an example of _________.

• predation
• emigration
• immigration
• isolation