The following points highlight the two types of germinal layers of the animals. The types are: 1. Segmentation 2. Development. Germinal Layers: Type # 1. Segmentation: Segmentation is division or differentiation of the body into distinct portions called segments. It is of two types: metameric segmentation and pseudo-metamerism. I. Metameric Segmentation (True metamerism or True […]
Types of Germinal Layers : 2 Types | Animals
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Types of Eggs of Various Animals: 2 Types
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The following points highlight the two types of eggs. The types are: 1. Eggs Based on Quantity of Yolk 2. Eggs Based on Distribution of Yolk in Cytoplasm. Type # 1. Eggs Based on Quantity of Yolk: 1. Microlecithal Eggs: They contain very small amount of yolk, e.g. eggs of Sea urchin, Herdmania, amphioxus. The […]
Structure of a Typical Fish (With Diagram)
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In this article we will discuss about the Structure of a Typical Fish. Fishes are cold blooded animals, typically with backbone, gills and fins. The body of a typical fish comprises the head, trunk and tail. The head bears two eyes, with well developed nictitating membrane, two internal ears, two nostrils which are closed internally […]
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