GED Science Practice

What is a mammal?

1. molten rock in the earth's crust

2. an aggregating leukocyte

3. an animal fed milk from the mother's body

4. that which has mass and occupies space

The correct answer is: an animal fed milk from the mother's body

A Molten rock in the earth's crust is a type of geological matter and is not a living being, therefore it cannot be considered a mammal. The key characteristic of a mammal is that it is a living animal. B: An aggregating leukocyte is a type of white blood cell, which is a part of the immune system in animals. While leukocytes are found in mammals, they are not exclusive to them and therefore cannot be used to define what a mammal is. D: The definition of a mammal goes beyond just having mass and occupying space, as all living things have these qualities. Mammals are a specific category of animals with distinct characteristics that differentiate them from other animals.