Competition

Competition becomes more important as the number of individuals ______ or the availability of resources _________.

• increases, decreases

• increases, increases

• decreases, increases

• decreases, decreases

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Two species of fish live in the same pond. Which of the following would increase competition between these two species of fish?

• Habitat temperature increases.

• Population of birds that eat the fish increases.

• Number of food plants the fish eat increases.

• Water level in the pond decreases.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

This diagram shows the variety of organisms that live in different tide zones. Mussels are common organisms that compete for space in intertidal (middle) tide zones. If all of the mussels were removed from zone A, which organisms would likely compete for the space in Zone A?

• Periwinkle and Limpets

• Sea lettuce and Chiton

• Sea urchins and Hermit crabs

• Rock louse and Periwinkle

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Animals from two different species utilize the same source of nutrition in one area. It is most accurate to say that the animals…

• will learn to get along

• will compete for food

• will die because there will not be enough food for both of them

• will learn to eat different foods

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Organism X feeds mainly on small fish, amphibians, and reptiles. With which organism is organism X most likely to compete?

• Great blue heron

• Mallard

• Pied-billed grebe

• Great egret

Tags

NGSS.MS-LS2-1

The population of deer in a certain area is monitored over a period of six years. The data is represented in the graph provided. Which of the following is the most likely explanation for the change in population in 2009?

• Wild dogs, which prey on deer, were being hunted more than usual.

• Snowfall in the previous spring was higher than the yearly average.

• Humans introduced grazing animals that feed on the same plants as the deer.

• More insects that pollinate flowering plants move into the ecosystem.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Plants compete for air, water, ________ within ecosystems.

• space, and sound

• sunlight, and wind

• space, and sunlight

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

_______ occurs when two organisms are trying to acquire or get the same resources.

• Symbiosis

• Competition

• Predation

• Collaboration

Two male deer fight over a female. This is an example of

• Symbiosis

• competition

• predation

Tags

NGSS.MS-LS1-4

What factor would cause animals of the same species to begin competing with one another?

• increase in precipitation         

• the presence of decomposers

• the introduction of a new food source

• limited supply of resources

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4