AnswersNC-Earth Environmental Science LBBiomes

Biomes — Unit test Answers

8 verified answers
1
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parasitismmutualismcommensalismcooperation

A
parasitism
B
mutualism
C
commensalism
D
cooperation
2
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Some consumers, like lions, do not eat plants or any other producers. They only eat other animals.How do lions obtain the carbon they need?

A
by eating animals that have carbon-based molecules stored in their bodies
B
by breathing it in from the atmosphere in the form of carbon dioxide
C
by absorbing carbon-based molecules through their skin from the soil
D
by drinking water that contains carbon dioxide
3

Which biome receives 200 to 400 cm of rain per year?

A
deciduous forest
B
temperate rain forest
C
taiga
D
grassland
4

The picture shows a natural environment.

Question illustration
A
water, sky, rocks, sand
B
bush, snake, cactus, rat
C
rat, sand, cactus, snake
D
bush, water, sky, snake
5

Study the image.

Question illustration
A
an organism
B
a community
C
a niche
D
a population
6

Which organism is a producer?

A
oak tree
B
mushroom
C
mountain lion
D
butterfly
7

In the Arctic, caribou and musk ox eat different kinds of plants, but the plants they eat typically grow in the same area. Therefore, these two species often require the same space in which to feed. In one part of the Arctic, caribou numbers have decreased and musk ox numbers have increased.Which best summarizes this scenario?

A
This is an example of cooperation, and the musk ox were better adapted to the environment.
B
This is an example of predation, and the musk ox were better adapted to the environment.
C
This is an example of competition, and the musk ox were better adapted to the environment.
D
This is an example of competition, and the caribou were better adapted to the environment.
8

The diagram illustrates the water cycle.

Question illustration
A
precipitation
B
evaporation
C
condensation
D
transpiration
9

What is the source of energy in most ecosystems?

A
animals
B
plants
C
oxygen
D
sunlight
10

Which best describes the carrying capacity of an environment?

A
An area of a desert can support a population of 320 cactus plants.
B
Over 1,500 species of birds live in a tropical rain forest.
C
About 500 fish in part of a river died as a result of water pollution.
D
A vegetable garden is six feet long and 10 feet wide.
11

Which represents the size of a population?

A
the birth rate
B
number of species in an area
C
the death rate
D
number of indivduals in a species
12

Some species of hares are brown most of the year, but change color to white in the winter. This allows them to blend in through the seasons.Where are these organisms adapted to live?

A
deciduous forests
B
desert
C
tropical rain forests
D
savanna
13

Examine the stone building shown.

Question illustration
A
abiotic because it is made from rock
B
biotic because it is made from rock
C
abiotic because it is a resource that living things use
D
biotic because it is a resource that living things use
14

Rosa drew a flow chart of the carbon cycle.

Question illustration
A
X: Producers undergo photosynthesis.Y: Decomposers return carbon to the soil and release waste.
B
X: Decomposers return carbon to the soil and release waste.Y: Producers undergo photosynthesis.
C
X: Decomposers take in carbon dioxide.Y: Producers absorb carbon through their roots.
D
X: Producers absorb carbon through their roots.Y: Decomposers take in carbon dioxide.
15

During the nitrogen cycle, through which structure are nitrogen compounds first absorbed into the plant?

A
roots
B
leaves
C
flower
D
stem
16

Study the picture of the ocean.

Question illustration
A
The environment contains several of the same species of coral.
B
The shallow area of the ocean meets the needs of the coral and the fish.
C
The ocean has fish and coral that live in the same area.
D
The coral take in food from the water and provide shelter for the fish.
17

Population X and Y live in the same area. The size of population X increases over time. As a direct result, the size of population Y decreases.Which is most likely the limiting factor of population Y?

A
Individuals of population X are predators.
B
Individuals of population X are prey.
C
Individuals of population Y caught and spread a disease.
D
Individuals of population Y lost their shelters after a flood.
18

Kendra is studying the energy pyramid shown.

Question illustration
A
The ecosystem can support fewer foxes than grasshoppers.
B
Foxes require less energy than birds.
C
The ecosystem can support more foxes than birds.
D
Grasshoppers require more energy than birds.
19

Which is the best example of commensalism?

A
Honey bees feed on the pollen of cornflowers and help the flowers reproduce.
B
Barnacles ride on a gray whale’s back to obtain food, and the whale is not harmed.
C
Squirrels and chipmunks eat the same nuts in a forest where food is scarce.
D
Prairie dogs often collect and eat food in groups so they are better protected from enemies.
20

In a grassland ecosystem, praying mantises catch and eat grasshoppers. However, there has been a significant decrease in the praying mantis population in recent years.How will this most likely affect the grasshopper population over time?

A
The population will decrease because grasshoppers are the competition.
B
The population will increase because grasshoppers are the prey.
C
The population will increase because grasshoppers are the competition.
D
The population will decrease because grasshoppers are the prey.

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