ES Chapter 4

Giraffes, lions, zebras, hyenas, and all the other living things of the Serengeti make up a (an)

• ecosystem

• population

• community

• biospere

Every spring, many species of bird travel north to the Artic to breed, and in the fall travel south again for the winter. This is an example of

• immigration

• emigration

• migration

• population growth

You are studying the vegetation communities of the Mongolian grasslands in a 1000 square kilometer area. What is your best strategy for estimating the number of individuals of different plant species growing throughout the grasslands?

• direct observation

• sampling

• indirect observation

• simply counting each one

Which is the highest population density of grasshoppers?

• 35 grasshoppers/10 square meters

• 40 grasshoppers/20 square meters

• 1 grasshoppers/1 square meter

• 50 grasshoppers/ 30 square meters

"All the living things and their physical environment within a given area" best defines

• community

• ecosystem

• biosphere

• population

You will be conducting a study of the interactions of vegetation, animals, mineral composition of the soil, and water levels in a saltmarsh. You are studying the saltmarsh

• population

• biosphere

• community

• ecosystem

A population of wolves is reintroduced into Yellowstone National Park. For the first decade, the wolf population grows expenentially. Then, the population growth slows. The new pattern is known as

• logistic growth

• limiting factors

• carrying capacity

• exponential growth

In the example above, where wolves are reintroduced to Yellowstone national Park, the number of elk and other prey species within the park are

• a density independent factor

• an example of biotic potential

• a density dependent factor

• a limiting factor

Wildlife managers reintroduce a species of antelope to a park in Africa from which it had been wiped out. The habitat is ideal, and in the first year, the population grows from 50 animals to 60. If the population experiences exponential growth, what will the approximate population be at the end of five years?

• 75

• 90

• 120

• 150

Pandas depend on bamboo. The amount of intact bamboo forest will help determine the

• biotic potential of the population

• carrying capacity of the population

• sex ratio of the population

• limiting factor of the population