Question

In tabular manner, list down all the basis used for classification of animals.

1)notochord
2)body organisation
3)germinal layers
4)body symmetry
5)body coelom
6)segmentation
7)circulatory system.

(please give description about this)
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Answer 1

Answer:

1)notochord

The notochord is the defining structure of the chordates, and has essential roles in vertebrate development. It serves as a source of midline signals that pattern surrounding tissues and as a major skeletal element of the developing embryo.

2)body organisation

The human body is organized at different levels, starting with the cell. Cells are organized into tissues, and tissues form organs. Organs are organized into organ systems such as the skeletal and muscular systems. All of the organ systems of the body work together to maintain homeostasis of the organism.

3)germinal layers

Alternative Titles: germinal layer, primary germ layer. Germ layer, any of three primary cell layers, formed in the earliest stages of embryonic development, consisting of the endoderm (inner layer), the ectoderm (outer layer), and the mesoderm (middle layer).

4)body symmetry

Biological symmetry can be thought of as a balanced distribution of duplicate body parts or shapes within the body of an organism. Importantly, unlike in mathematics, symmetry in biology is always approximate.

5)body coelom

The coelom is the main body cavity in most animals[1] and is positioned inside the body to surround and contain the digestive tract and other organs. In some animals, it is lined with mesothelium. In other animals, such as molluscs, it remains undifferentiated. In the past, and for practical purposes, coelom characteristics have been used to classify bilaterian animal phyla into informal groups.

6)segmentation

Market segmentation is a process of dividing a heterogenous market into relatively more homogenous segments base on certain parameters like geographic, demographic, psychographic, and behavioural.

7)circulatory system

The circulatory system, also called the cardiovascular system or the vascular system, is an organ system that permits blood to circulate and transport nutrients (such as amino acids and electrolytes), oxygen, carbon dioxide, hormones, and blood cells to and from the cells in the body to provide nourishment and help in ...

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