Populations

Which factor increases the impact that disease has on a population?

• location

• climate

• density

• food source

Tags

NGSS.MS-LS2-4

Which of these has the largest effect on the food sources in an ecosystem?

• number of producers

• amount of transpiration

• amount of evaporation

• number of decomposers

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

Which best describes how food availability affects the carrying capacity of an area?

• As food availability increases, carrying capacity increases in all ecosystems.

• As food availability increases, carrying capacity decreases in all ecosystems.

• As food availability increases, the carrying capacity increases in aquatic food webs only.

• As food availability increases, the carrying capacity decreases in terrestrial food webs only.

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

NGSS.MS-LS2-3

Which is a biotic limiting factor that would influence the growth of a deer population?

• a forest fire

• high temperatures

• amount of plant growth

• amount of monthly rainfall

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

Which will most likely result in a negative growth rate in the human population of a country?

• The death rate is higher than the birth rate.

• The birth rate is higher than the death rate.

• The country has improved economic conditions.

• The country has made improvements in sanitation.

Ten fish were living well in a 10-gallon fish tank. When five fish were added to the tank later, some fish began to die. Which best explains this occurrence?

• The fish ran out of carbon dioxide

• The fish had no space in which to swim.

• The fish exceeded the carrying capacity of the tank.

• The new fish began to use the older fish for food.

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

What could cause a population to reach its carrying capacity?

• The population adapts.

• The population becomes extinct.

• The population has a limited food supply.

• The population finds a new food source.

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

Which is a density-dependent limiting factor that affects population size?

• disease

• climate

• drought

• natural disasters

Tags

NGSS.MS-LS2-4

What would most likely occur if the predators of plant eaters were eliminated in an ecosystem?

• an increase in the number of herbivores in the ecosystem

• an increase in the number of carnivores in the ecosystem

• a decrease in the number of decomposers in the ecosystem

• a decrease in the number of predators migrating into the ecosystem

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

NGSS.MS-LS2-2

A population of foxes in a forest ecosystem has become stable, neither growing nor becoming smaller. Which statement would best describe the population of foxes?

• The foxes are not dying or reproducing.

• The fox population has reached its carrying capacity.

• The foxes are moving into and out of the forest ecosystem.

• The fox population has failed to change due to lack of food and water.

Tags

NGSS.MS-LS2-4