Scelta multipla
Which characteristic of nematocysts makes them effective for hunting and defense in animals?
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30. Overview of Animals
Overview of Animals
Scelta multipla
Which of the following is characteristic of all birds?
A
Live birth
B
Ability to fly
C
Feathers
D
Four-chambered heart
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Begin by identifying the unique characteristics of birds compared to other animals. Birds are a distinct class of animals known as Aves.
Consider the options provided: live birth, ability to fly, feathers, and four-chambered heart. Evaluate each characteristic to determine if it is exclusive to birds.
Live birth is not a characteristic of all birds. Birds lay eggs, which is a key reproductive feature of this class.
Ability to fly is not exclusive to birds, as some birds are flightless (e.g., ostriches, penguins), and other animals like bats can fly.
Feathers are a defining characteristic of all birds. They are unique to birds and serve various functions such as insulation, flight, and display. Therefore, feathers are the correct answer.
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