AnswersScience 7 B M12 2526 S2Cumulative Exam

Cumulative Exam — Cumulative exam Answers

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Ground squirrels inhabit African savannas. Which adaptation helps the ground squirrels live in this biome?

A
tan coloring to blend in with the surroundings
B
thick fur to conserve heat
C
sharp claws for climbing trees
D
white coloring to blend in with the surroundings
22
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Consider these steps involved in bacterial reproduction.X: Cell wall and membrane divide and separate.Y: Genetic material is replicated.Z: Two independent cells form.

A
X → Y → Z
B
Z → X → Y
C
Y → X → Z
D
Y → Z → X
23

Which are characteristics of mammals? Check all that apply.internal fertilizationthree-chambered heartendothermichighly developed nervous systemseveral nearly hollow bonesalways live on land

A
internal fertilization
B
three-chambered heart
C
endothermic
D
highly developed nervous system
E
several nearly hollow bones
F
always live on land
24

The esophagus, stomach, and small intestines all function together to digest food and absorb nutrients. Which level of organization is being described?

A
cell
B
tissue
C
organ
D
organ system
25

A scientist is observing a worm that was found inside a host. The worm has an outer body that is smooth and soft.

A
an earthworm
B
a pinworm
C
a hookworm
D
a tapeworm
26

Which biomes receive less than 100 cm of rain each year? Select three options.tropical rain foresttemperate rain forestdeserttundragrassland

A
tropical rain forest
B
temperate rain forest
C
desert
D
tundra
E
grassland
27

Gerri says that spiders use their fangs for the same purpose that crustaceans use their claws. Alana disagrees and says that spiders use their fangs for the same purpose that centipedes use their claws.

A
Alana is correct because spiders use their fangs to inject venom. Centipedes use their claws for this same purpose.
B
Alana is correct because spiders use their fangs to catch prey. Centipedes use their claws for this same purpose.
C
Gerri is correct because spiders use their fangs to inject venom. Crustaceans use their claws for this same purpose.
D
Gerri is correct because spiders use their fangs to catch prey. Crustaceans use their claws for this same purpose.
28

parasitismmutualismcommensalismcompetition

A
parasitism
B
mutualism
C
commensalism
D
competition
29

Which shows the correct order of processes for fungi to reproduce sexually?

A
A fungus that is genetically identical to the parent fungus is produced, a spore forms, and hyphae exchange genetic material.
B
A spore forms, a genetically unique fungus is produced, and hyphae exchange genetic material.
C
Hyphae exchange genetic material, a spore forms, and the spore grows into a genetically unique fungus.
D
A spore forms, hyphae exchange genetic material, and a fungus that is genetically identical to the parent fungus grows.
30

Peter is complaining of stomach pain and constant hunger. Peter’s doctor diagnoses him with a worm infection. Peter feels hungry because the worm is absorbing food from his intestines.

A
tapeworm.
B
leech.
C
planarian.
D
marine worm.
31

Which statement best contrasts pioneer species and climax communities?

A
Pioneer species are involved in the first stage of succession, and climax communities are involved in the final stage of succession.
B
Pioneer species are involved in the final stage of succession, and climax communities are involved in the first stage of succession.
C
A pioneer species will change into a different species in the climax community.
D
A climax community is made up of multiple pioneer species.
32

Carlos made a study chart about changes to the environment that are caused by humans. Environmental Changes Caused by HumansXYResults from introducing harmful substances into the environmentCauses an increase in ultraviolet radiation that reaches Earth Results from the rising human populationCauses the disappearance of many species in a short amount of time

A
X: Ozone Layer DestructionY: Mass Extinction
B
X: Long-Term ChangesY: Short-Term Changes
C
X: Short-Term ChangesY: Long-Term Changes
D
X: Mass ExtinctionY: Ozone Layer Destruction
33

On a warm summer day, a deer is searching for something to drink. The deer is most likely responding to which kind of stimulus?

A
the external stimulus of heat
B
the internal stimulus of heat
C
the internal stimulus of thirst
D
the external stimulus of thirst
34

In which environment would primary succession take place? Select 2 options. an abandoned fielda cooling lava flowan area of bare rock under a glacieran unused farma deserted mine

A
an abandoned field
B
a cooling lava flow
C
an area of bare rock under a glacier
D
an unused farm
E
a deserted mine
35

The diagram illustrates the water cycle.

Question illustration
A
Water cycles from a nonliving to a living part of the environment.
B
Water changes from a liquid to a gas.
C
Water changes from a gas to a liquid.
D
Water cycles from a living to a nonliving part of the environment.
36

Veronica got a cut on her arm, and it started bleeding. Her circulatory system started working hard to prevent blood loss and protect against infection.Which two components of the blood were functioning at a higher level than normal?

A
platelets and plasma
B
plasma and red blood cells
C
white blood cells and platelets
D
red blood cells and white blood cells
37

Chris drew a diagram to compare the ways in which different organisms obtain nitrogen.

Question illustration
A
breathe in from atmosphere
B
produce themselves
C
eat other organisms
D
absorb from soil
38

To study for a test, Gerald made this table summarizing the functions of flower structures.If Gerald memorized this table to study for his test, which statement can most likely be made about his test results?

Question illustration
A
Gerald missed a question on the sepal.
B
Gerald missed a question on the petals.
C
Gerald got a 100% on his test.
D
Gerald got a 50% on his test.
39

Denise made a diagram to compare characteristics of two kinds of plants.

Question illustration
A
gametophyte stage
B
rhizoids
C
sporophyte stage
D
xylem
40

The ulna, radius, and humerus are the three bones of the arm. The elbow is formed where these bones meet. Which is another name for the elbow?

A
joint
B
tendon
C
cartilage
D
bone marrow

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