Population density refers to

the number of organisms living in a certain amount of space

the number of organisms that immigrate into a community

the number of organisms that emigrate out of a community

the number of organism in a community

When the population density of an ecosystem gets too high,

organisms don't have enough food

there is not enough space for all the inhabitants living there

the water available becomes a limited resource

What is the carrying capacity of an ecosystem?

the maximum number of organisms an ecosystem can support

the lowest number of organisms an ecosystem can support

the minimum number of organism an ecosystem can support

the heaviest load an organism can carry

The closer a population of an ecosystem get to its carrying capacity,

the more competition there is for resources

the less competition there is for resources

it does not effect the ecosystem at all

In a parasitic relationship

one organism benefits and the other is harmed

one organism benefits and the other is unaffected

In a mutualism relationship

one organism benefits and the other is unaffected

one organism benefits and the other is harmed

In a commensalism relationship

one organism benefits and the other is unaffected

one organism benefits and the other is harmed

In a competition relationship

both organisms are competing for the same resources

one organism benefits and the other is unaffected

one organism benefits and the other is harmed

Limiting factors are things in an environment that

could cause a population to die off over time

cause a population to stop growing

help a population thrive and grow

provide extra resources to organisms

In a predator/prey relationship

one organism eats the other for food

both organisms are competing for the same resources

one organism benefits and the other is unaffected

An example of a predator/prey relationship is

a giraffe eating leaves on a tree

A population will be limited in growing

when there are more species competing for food

when the birth rate is greater than the death rate

when the resources are all abundant

Population density can have a negative effect on an ecosystem

when the number of organisms living there is near the carrying capacity

when there are only a few organisms living there

when there a variety of organisms in the ecosystem

when the birds migrate south for the winter months

When a population reaches its carrying capacity,

less resources are available and competition increases

more organisms can live successfully

more food is available but less space is there for homes

A predator-prey relationship occurs when

one organism eats another organism for food

one organism lives inside the other organism

one organisms does not harm the other organism

one organism produces its own food

Chapter 9 Populations and Communities

Quiz

•

Science

•

6th Grade

•

Practice Problem

•

Hard

•

NGSS

MS-LS2-4, MS-LS2-2, MS-LS1-5

+2

Standards-aligned

Charles Martinez

FREE Resource

27 questions

Show all answers

1.

DROPDOWN QUESTION

1 min • 1 pt

All of the following could limit the growth of a population except which factor? (a)

harsh winter

increased predator population

lack of rain

plentiful food sources

The organism that is harmed in a parasitism symbiosis.

Host (Human)

Parasite (Mosquito)

Mutualism

Mutualism (Bee pollinating flowers and getting food in returns)

No choice is correct

3.

DRAG AND DROP QUESTION

1 min • 5 pts

A relationship between two different species. (a)

Symbiosis

Community

All the living things in an area.

Population

No choice is correct

Small changes in one part of an ecosystem can cause changes elsewhere in the ecosystem.

True

False

All of the following are visual communication examples EXCEPT (a)

sage grouse mating dance

shaking of a rattlesnake tail

howl of a wolf

lightning bug glowing

6.

DRAG AND DROP QUESTION

1 min • 1 pt

The purpose of visual communication is to (a)

ward off predators

attract a mate

locate food

all of the answers above

7.

DROPDOWN QUESTION

1 min • 1 pt

All of the following are auditory communication examples except (a)

the song of a humpback whale

the bugle of a bull elk

the change in color of a chameleon

the bark of a coyote

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Chapter 9 Populations and Communities

27 questions

All of the following could limit the growth of a population except which factor? (a)

The organism that is harmed in a parasitism symbiosis.

A relationship between two different species. (a)

Small changes in one part of an ecosystem can cause changes elsewhere in the ecosystem.

All of the following are visual communication examples EXCEPT (a)

The purpose of visual communication is to (a)

All of the following are auditory communication examples except (a)

The purpose of auditory communication is to (a)

A graph displaying the population of an organism and its predator's population over time looks like which of the following?

Which relationship is parasitic?

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