AnswersScience 7 B M12 2526 S2Unit Test

Unit Test — Unit test Answers

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Selena made a chart to group adaptations in birds based on their main functions.

Question illustration
A
X: FlightY: Feeding and Digestion
B
X: Maintaining Body TemperatureY: Circulating Oxygen
C
X: Flight Y: Circulating Oxygen
D
X: Maintaining Body TemperatureY: Feeding and Digestion
2
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After Dante catches the flu virus, he feels very tired and loses his appetite. His body aches and he gets a high fever.Which best describes Dante’s symptoms?

A
they are a response to an infection, which is an internal stimulus
B
they are a response to being tired, which is an external stimulus
C
they are a response to hunger, which is an internal stimulus
D
they are a response to an illness, which is an external stimulus
3

The chart shows characteristics of two groups of mammals.Which headings correctly complete the chart?

Question illustration
A
X: MarsupialY: Placental
B
X: Placental Y: Marsupial
C
X: MonotremeY: Placental
D
X: PlacentalY: Monotreme
4

A snail is shown in the diagram.

Question illustration
A
digest prey
B
pump blood into the heart
C
remove carbon dioxide from blood
D
capture prey
5

Suri bought a pet fish. What should she consider when deciding where to put the tank?

A
It should be in a place with a stable temperature because fish are endotherms.
B
It should be placed in a dark area because fish are endotherms.
C
It should be in a place with a stable temperature because fish are ectotherms.
D
It should be placed in a dark area because fish are ectotherms.
6

Which diagram best illustrates how the circulatory system of a fish functions?

A
Option
Option A
B
Option
Option B
C
Option
Option C
D
Option
Option D
7

Which characteristic is shared by all mollusks and echinoderms?

A
live only in salt water
B
lack a backbone
C
use tube feet to move
D
have an open circulatory system
8

Which is the best example of a response to an external stimulus?

A
drinking water after a long run
B
avoiding the sun by looking for food at night
C
a hungry bear hunting for food
D
falling asleep in the treetops of a forest
9

Andre is observing an arthropod that has three body sections, one pair of wings, three pairs of legs, and a one-way digestive system.

A
The arthropod is a fly because it has one pair of wings and three pairs of legs.
B
The arthropod is a fly because it has three body sections and a one-way digestive system.
C
The arthropod is a pill bug because it has one pair of wings and three pairs of legs.
D
The arthropod is a pill bug because it has three body sections and a one-way digestive system.
10

Georgia made a study chart about worms.

Question illustration
A
X: FlatwormsY: Segmented worms
B
X: Segmented wormsY: Roundworms
C
X: FlatwormsY: Roundworms
D
X: RoundwormsY: Flatworms
11

Which of these are characteristics of reptiles? Check all that apply. They undergo internal fertilization.Their urine is concentrated.They use their skin for gas exchange.They have two-chambered hearts.They are covered in scales.

A
They undergo internal fertilization.
B
Their urine is concentrated.
C
They use their skin for gas exchange.
D
They have two-chambered hearts.
E
They are covered in scales.
12

Juanita drew a Venn diagram to compare reproduction in sponges and cnidarians.

Question illustration
A
can reproduce by budding
B
can reproduce by fragmentation with regeneration
C
reproduce in two stages
D
reproduce in a single stage
13

Dante has a vegetable garden. He places several earthworms in the garden’s soil.

A
They prevent too much water from seeping into the soil.
B
They help break down dead plant and animal matter.
C
They feed on garden pests and act as natural insecticides.
D
They help keep dead plant and animal matter from breaking down.
14

Xavier listed the steps involved when sponges take in food and oxygen.1. Water is drawn in through pores and enters the central cavity. 2. Food is filtered and digested.3. Water leaves through an opening at the top of the body.

A
Oxygen is removed from the water before step 3.
B
Oxygen is removed from the water after step 3.
C
Tentacles sting and paralyze prey after step 1.
D
Tentacles sting and paralyze prey before step 1.
15

Which are characteristics of arthropods? Check all that apply. radial symmetrynervous systemasexual reproductionsegmented bodyopen circulatory system

A
radial symmetry
B
nervous system
C
asexual reproduction
D
segmented body
E
open circulatory system
16

The chart shows characteristics of two groups of reptiles.

Question illustration
A
X: TurtlesY: Crocodilians
B
X: CrocodiliansY: Turtles
C
X: Snakes Y: Turtles
D
X: CrocodiliansY: Snakes
17

Which statement best compares segmented worms and roundworms?

A
Some segmented worms have setae, but roundworms do not.
B
Some roundworms have setae, but segmented worms do not.
C
Segmented worms have sense organs, but roundworms do not.
D
Roundworms have sense organs, but segmented worms do not.
18

Helena made a diagram to compare two kinds of fish.

Question illustration
A
Lungs
B
Jaws
C
Skeleton made of bones
D
Skeleton made of cartilage
19

A fish is resting in a shady part of the water, protected by surrounding rocks. The fish suddenly moves out into an open area that is sunny and closer to the surface of the water.What is most likely the reason the fish moved?

A
to increase its body temperature
B
to slow down blood circulation
C
to obtain oxygen
D
to take in extra carbon dioxide
20

Which characteristics do hookworms and tapeworms share? Check all that apply. They are types of roundworms.They are parasitic.They have a digestive system.They cause diseases in humans.They have nerve cells.They can be used to treat illnesses.

A
They are types of roundworms.
B
They are parasitic.
C
They have a digestive system.
D
They cause diseases in humans.
E
They have nerve cells.
F
They can be used to treat illnesses.

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