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Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
ISBN: 9781305389892

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BuyFindarrow_forward

Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
ISBN: 9781305389892
Textbook Problem

What are egg coats, and what is their function? What egg coats do mammalian and bird eggs have?

Summary Introduction

To review:

The egg coats and its type in mammalian and bird eggs with its function.

Introduction:

Egg is an incredible part of an animal cell. It is a highly specialized cell. Egg gets activated by the fertilization with the sperm. After activation, it gives rise to a completely new individual. However, in some organisms’ eggs can be activated artificially in the absence of sperm. This process is known as parthenogenesis. The egg is usually surrounded by outer shell known as egg coat.

Explanation

The egg is surrounded by outer covering known as egg coat. It is the peculiarity of eggs, which protects the egg from physical damage. It is made up of polysaccharides such as cellulose and proteins such as collagen. It is deposited surround the cell and also acts as a barrier in some species. Hence, it prevents the sperm from different species and allows the sperm of either similar or closely related species.

The egg of the bird is made up of the extracellular matrix. It is known as the vitelline layer. This layer is transparent in nature...

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