Amplify Populations and Resources

Scientists have been studying the size of three populations in Peru. In this ecosystem, pumas (large wild cats) eat deer, and deer eat grass. The data showed that all three populations were stable. Then the puma population increased suddenly. What will most likely happen to the size of the deer population as a result? The size of the deer population will . . .

• increase

• decrease

• stay the same

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

In the Arctic region, polar bears eat seals, and seals eat cod (a type of fish). In the last 7 years, the sizes of all the populations stayed stable, but recently the size of the polar bear population decreased. What will likely happen to the cod population? The size of the cod population will . . .

• increase because when one population increases, the others do too.

• decrease because less seals are being eating, making them increase, and eating more cod.

• stay the same

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-3

NGSS.MS-LS2-4

A population of tigers lives in Bangladesh. Over 50 years, the size of the tiger population increased. What best explains the increase in the size of the tiger population?

• A lot of tigers were born and none of them died.

• Fewer tigers were born than died.

• The tiger population is always increasing because no animal eats tigers.

• More tigers were born than died.

Tags

NGSS.MS-LS2-4

In North America, both bears and eagles eat trout. The sizes of the populations have been stable for the last 9 years, but recently the size of the eagle population decreased. What will likely happen to the bear population?

The size of the bear population will . . .

• increase

• decrease

• stay the same

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

What is a population?

• a group of the same type of organism living in the same area

• a group of similar organisms in an ecosystem

• a group of people attending a movie

• a group of different types of organisms in the same area

Tags

NGSS.MS-LS4-4

A population that is eaten by organisms from another population is a

• resource population

• resort population

• resident population

• respectful population

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Which of the following is a type of organism that is a resource population?

• grass

• mice

• lions

• krill

Tags

NGSS.MS-LS2-1

a group of the same type of organism living in the same area

• population

• populist

• popcorn

• pop music

What is the primary factor that can lead to an increase in a population's size?

• Increased birth rate and decreased death rate

• Decreased birth rate and increased death rate

• Stable birth and death rates

• Increased emigration

Which of the following is a real-world application of population amplification in agriculture?

• Using pesticides to control pests

• Genetically modifying crops to increase yield

• Implementing crop rotation

• Reducing water usage in irrigation

Tags

NGSS.MS-LS1-5