AnswersAISD-Biology B CR 25-26Relationships between Organisms

Relationships between Organisms — Unit test Answers

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1
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Which phrase describes one main feature of the atmosphere?

A
protects Earth’s surface
B
includes organisms in the air, on land, and in water
C
consists of rocks, minerals, landforms, and Earth’s interior
D
comprises oceans, lakes, rivers, streams, and groundwater
2
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Which statement describes primary consumers?

A
They eat secondary consumers.
B
They eat producers.
C
They obtain their energy from the Sun.
D
They are found before producers in a food chain.
3

Which statement describes prey?

A
They provide energy for dead organisms.
B
They are killed by predators for energy.
C
They obtain energy from dead organisms.
D
They obtain energy from predators.
4

Which are abiotic factors as well as basic needs that living things compete for?

A
bacteria and water
B
fungi and bacteria
C
pollen and sunlight
D
sunlight and water
5

Which statement describes abiotic factors in an environment?

A
Chickens run around a farm.
B
Soil retains water and nutrients.
C
Bacteria use energy to reproduce.
D
Plants compete for sunlight in an ecosystem.
6

Which phrase describes a population?

A
a group of different communities in an area
B
organisms of the same species living in an area
C
nonliving things that interact with living things in a region
D
organisms that belong to the same community within a region
7

Which statement describes competition within a population?

A
Several killer whales migrate to a new location.
B
Two male sea horses fight to win over a female.
C
Several elk travel together to find and share water.
D
Different kinds of garden plants take in water from the soil.
8

The diagram illustrates the water cycle.

Question illustration
A
U
B
W
C
X
D
Y
9

A leech attaches to an animal and feeds off the animal's blood.What happens to the animal the leech attaches to in this scenario?

A
It loses nutrients to the leech.
B
It gains nutrients from the leech.
C
It will be killed and eaten by the leech.
D
It will kill and eat the leech.
10

Sydney drew a flow chart to illustrate the nitrogen cycle.

Question illustration
A
X: Producers undergo photosynthesis.Y: Nitrogen compounds are released into the air.
B
X: Nitrogen compounds are released into the air.Y: Producers undergo photosynthesis.
C
X: Free nitrogen is in the atmosphere.Y: Producers absorb nitrogen compounds through their roots.
D
X: Producers absorb nitrogen compounds through their roots.Y: Free nitrogen is in the atmosphere.
11

Fish eat algae, which are organisms that make their own food.Which two types of organisms are present in this scenario?

A
consumer and producer
B
decomposer and producer
C
predator and prey
D
prey and consumer
12

Which statement describes an interaction between the biosphere and the hydrosphere?

A
Plant roots take in water through their roots.
B
Plants take in carbon dioxide from the air.
C
Energy stored in plants is transferred to humans and animals that eat them.
D
Plants make food through photosynthesis and release oxygen into the atmosphere.
13

Which landform is part of the cryosphere?

A
glacier
B
lake
C
ocean
D
river
14

Which best explains why a thick tropical forest filled with large plants typically has a lot of water vapor in the air?

A
The plants undergo transpiration.
B
The plants undergo condensation.
C
The plants prevent water from evaporating.
D
The plants prevent water from becoming runoff.
15

Humans’ use of rocks and minerals as building materials is an example of which interaction?

A
an interaction within the geosphere
B
an interaction within the hydrosphere
C
an interaction between the biosphere and the geosphere
D
an interaction between the biosphere and the atmosphere

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