Population & resources review

A consumer population is the population that..

• eats others.

• is eaten by others .

If the number of births in a population is the same as the number of deaths in a population, what will happen to the growth of the population?

• It will increase.
• It will decrease.
• It will stay the same.
• It will fluctuate.

When a population is INCREASING it means...

• There are more births than deaths

• There are more deaths than births

• There are the same number of births and deaths

• No organisms were born or died.

If owls are eating mice and getting energy storage molecules from the mice, which is the resource population?

• owls

• mice

Tags

NGSS.MS-LS2-1

How do consumers get energy storage molecules?

• By eating other animals (through food).

• They make their own through photosynthesis.

• They don't need energy storage molecules.

A resource population is the population that..

• eats others.

• is eaten by others .

Scientists have been studying the size of three populations in a grassland. In this ecosystem, snakes eat rats, and rats eat grasshoppers. The data showed that all three populations were stable. Then the grasshopper population decreased suddenly. What will likely happen to the size of the rat population as a result?

• stay the same. The size of their consumer population did not change, so the number of deaths in the rat population did not change. There will be the same number of births and deaths in the rat population.

• increase. The smaller grasshopper population will need fewer energy storage molecules so there will be more energy storage molecules available for the rat population to reproduce. This will lead to more births in the rat population.

• decrease. A decrease in any population leads to a decrease in the sizes of all other populations in the ecosystem.

• decrease. The smaller grasshopper population provides fewer energy storage molecules for the rat population, so the rat population will reproduce less. This will lead to fewer births than deaths in the rat population.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

What is an ecosystems?

• Where only plants live

• Where only animals live

• Where everything, living and nonliving, interact with each other

• A group of the same organism

Tags

NGSS.MS-LS2-3

If the resource population decreases, then the consumer population will....

• Increase

• Stay the same

• Decrease

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

True or False: Within a population organisms are always being born and dying.

• True

• False