Inquiry into Life
Inquiry into Life
16th Edition
ISBN: 9781260482638
Author: Mader, Sylvia
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Chapter 32.3, Problem 2CYP
Summary Introduction

To write:

Why are placental mammals unique in nature?

Introduction:

Mammals are animals belonging to the class Mammalia. The main feature of mammals is that they have a region in the brain which is named as the neocortex. It has hairs, three middle ear bones and a unique feature known as mammary gland. Mammals are further classified into Eutheria which is also known as true placental mammals, and Metatheria which is also known as marsupials and Prototheria.

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Phylogenetic Mysteries: Crash Course Zoology #12; Author: CrashCourse;https://www.youtube.com/watch?v=cVaw7nF72Aw;License: Standard youtube license