Scelta multipla
Which of the following is a key feature of arthropods?
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30. Overview of Animals
Overview of Animals
Scelta multipla
What is a characteristic of all amphibians?
A
They have moist, permeable skin.
B
They lay hard-shelled eggs.
C
They are exclusively aquatic throughout their life cycle.
D
They have scales covering their bodies.
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Begin by understanding the basic characteristics of amphibians. Amphibians are a class of animals that include frogs, toads, salamanders, and newts.
Recognize that amphibians are known for their unique skin, which is moist and permeable. This allows them to absorb water and oxygen directly through their skin, which is a key adaptation for their survival.
Consider the reproductive habits of amphibians. Unlike reptiles, amphibians typically lay eggs in water, and these eggs do not have hard shells. This is an important distinction from the option of laying hard-shelled eggs.
Understand the life cycle of amphibians. While they often start life in water as larvae (like tadpoles), many amphibians undergo metamorphosis and can live on land as adults. Therefore, they are not exclusively aquatic throughout their life cycle.
Note that amphibians do not have scales covering their bodies. Scales are characteristic of reptiles, not amphibians. Amphibians have smooth skin, which is another distinguishing feature.
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