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Multiple Choice
Which of these is a unique characteristic of mammals?
A
Laying eggs
B
Feathers
C
Presence of mammary glands
D
Three-chambered heart
Verified step by step guidance
1
Identify the key characteristics that are unique to mammals. Mammals are a class of animals with specific traits that distinguish them from other vertebrates.
Consider the options provided: laying eggs, feathers, presence of mammary glands, and a three-chambered heart.
Understand that laying eggs is a characteristic of some mammals (monotremes) but is not unique to mammals as birds and reptiles also lay eggs.
Recognize that feathers are a characteristic of birds, not mammals.
Note that the presence of mammary glands is a defining feature of mammals, as they are used to produce milk to nourish their young, which is unique to this class of animals.