Overview of Animals Answers
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Which three steps describe how an animal obtains and uses energy for growth?
A
First, an animal eats another organism. Then, food is built into larger molecules. Next, the animal’s cells use molecules to make new cells.B
First, food is built into larger molecules. Then, the animal eats another organism. Next, the animal’s cells use molecules to make new cells.C
First, an animal eats another organism. Then, food is broken down into smaller molecules. Next, the animal’s cells use molecules to make new cells.D
First, food is broken down into smaller molecules. Then, the animal eats another organism. Next, the animal’s cells use molecules to make new cells.2
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A
homeostasisB
heterotrophsC
adaptationD
eukaryotic3
Brendan made a chart to categorize the characteristics of animals.
A
Are multicellularB
Have membrane-bound organellesC
Produce their own foodD
Display an asymmetrical body plan4
Clams and oysters are examples of invertebrates.
A
shellB
backboneC
gillsD
muscles5
A scientist discovers a new organism and is trying to classify it. Which observations would most likely indicate that the organism is an animal?
A
It is multicellular and can move itself from place to place.B
It is heterotrophic and unicellular.C
It makes food from sunlight and is eukaryotic.D
It is prokaryotic and can move itself from place to place.6
A scientist is studying an organism and has classified it as an animal.
A
It is multicellular.B
It displays radial symmetry.C
It has a backbone.D
It contains cells without nuclei.7
Which statement best explains why invertebrates often have outer skeletons but vertebrates do not?
A
The outer skeleton provides protection, since invertebrates do not have backbones.B
The outer skeleton surrounds the spinal cord, since invertebrates do not have backbones.C
The outer skeleton helps invertebrates maintain homeostasis, since they lack spinal cords.D
The outer skeleton helps invertebrates maintain homeostasis, since they lack membrane-bound organelles.8
What is a function of the backbone in animals?
A
It protects against predators.B
It regulates blood glucose.C
It surrounds the spinal cord.D
It limits movement.9
Which function allows animals to find mates?
A
movementB
homeostasisC
reproductionD
feeding10
Which two characteristics describe all animals?
A
multicellular and symmetricalB
multicellular and asymmetricalC
heterotrophic and multicellularD
heterotrophic and unicellularDid you find these answers helpful?
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