Archive | Animals

Prokaryotes and Eukaryotes (Differences)

Learn about the comparison between Prokaryotes and Eukaryotes. Comparison # Prokaryotes: 1. Cell in prokaryotes is smaller in size with a primitive type of nucleus called nucleoid or genophore. 2. The nuclear membrane is absent in prokaryotes. 3. The genetic material is only nucleic acid DNA. 4. The DNA molecules are circular and not associated with histone protein. 5. Endoplasmic [...]

By |2016-05-27T11:36:44+00:00May 27, 2016|Cell|Comments Off on Prokaryotes and Eukaryotes (Differences)

4 Main Types of Tissues Seen in Animals

The following points highlight the four main types of tissues seen in animals. The types are: 1. Epithelial Tissues 2. Connective Tissue 3. Muscular Tissue 4. Nervous Tissue. Type # 1. Epithelial Tissues: The cells taking part in this type of animal tissue have a regular, well-defined shape and scanty intercellular substance. They are usually in contact with one another [...]

By |2016-05-27T11:36:44+00:00May 27, 2016|Tissues|Comments Off on 4 Main Types of Tissues Seen in Animals

Classification of Animals: Artificial and Natural

In this article we will discuss about the artificial and natural classification of animals. Artificial Classification of Animals: When a classification is constructed on the basis of a few external characters, even a single arbitrarily chosen character and with­out their relationships, called artificial type of classification. The early taxonomists fol­lowed artificial type of classification up to 18th century, e.g., Aristotle [...]

By |2016-05-27T11:36:29+00:00May 27, 2016|Taxonomy|Comments Off on Classification of Animals: Artificial and Natural
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