Biology
Biology
12th Edition
ISBN: 9780134813448
Author: Audesirk, Teresa, Gerald, Byers, Bruce E.
Publisher: Pearson,
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Chapter 25, Problem 5FIB
Summary Introduction

Introduction:

Mammals are the only animals with mammary gland possessing in the animal kingdom. Mammary glands are used by females to feed their young ones. In mammals hairs are found to insulate the body. There are three main lineages of mammals: monotremes, placental animals, and marsupials.

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