Biology 5

There are 150 Saguaro catus plants per square kilometer in a 10-square-kilometer area of Arizona desert. To which population characteristics does this information refer?

• growth rate

• geographic range

• age structure

• population density

A small farming community in Texas covers 14 square kilometers. There are 420 individuals who live within the town limits. What is the population density of this community?

• 0.03 individuals per square kilometer

• 53 individuals per square kilometer

• 30 individuals per square kilometer

• 10.24 individuals per square kilometer

When the exponential phase of a logistic growth curve of a population ceases,

• the size of the population drops

• the size of the population stays the same

• population growth begins to slow down

• population growth begins to speed up

Which density-dependent factors other than the predator/prey relationship affected the population of moose and wolves on Isle Royale?

• extreme temperatures for the moose and flooding for the wolves

• parasitic wasps for the wolves and clear-cut forest for the moose

• a hurricane followed by drought for both moose and wolves

• food availiability for the moose and disease for the wolf

A disease resulting in the deaths of one third of a dense population of bats in a cave would be a

• density-dependent limiting factor

• result of exponential growth

• density-independent limiting factor

• nutrient-limiting factor

Which of the following is a density-independent limiting factor?

• a struggle for food, water, space, or sunlight

• predator/prey relationship

• the eruption of a volcano

• parasitism and disease

Demographic transition is change from high birthrates and high death rates to

• exponential growth

• low birthrates and low death rates

• low birthrates and high death rates

• indefinite growth

Countries in the first stage of demographic transition have

• a high deathrates and high birthrates

• a high death rate and low birthrates

• a slowly growing population

• more old people than young people

In Rwanda, there are more young children than teenagers, and more teenagers than adults. This age structures indicates a population that

• has stopped growing

• will double in 30 years

• has a steady growth rate

• will decrease in 30 years

Murray is observing a bacterial colony that is growing in agar in a Petri dish. Agar is processed seaweed. Murray calculates that the popluation doubles every 32 hours. Which conclusion is supported by Murray's observation?

• The agar and air are providing all of the resources needed by the bacteria

• The bacteria is growing in all regions of the agar in the Petri dish

• The bacterial colony will countinue doubling in size indefinitely

• The agar and air in the Petri dish are limiting factors on the growth of the bacterial colony