Basis Of Classification
Chapter Name : Animal Kingdom |
Sub Topic Code : 103_11_04_01_05 |
Topic Name : Basis Of Classification |
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Sub Topic Name : Segmentation |
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Introduction
Sometimes the body of an animal is divided internally and externally into segments.
Pre-Requisites:
Levels of organization.
Activity:
Observe the body of an earthworm with naked eye.It shows that the body of the earthworm is externally segmented.
Real Life Question:
When the body of an animal is segmented, are all these segments same or different?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Metamersim | When the body of an organism shows a pattern of segmentation called metameric segmentation. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Observe the cross section of an earthworm under microscope and see the different segments one by one. | Body is internally segmented and some organs are repeated in segments. |
Places to visit :
Biology Laboratory.
Practical examples around us
| Examples | Explainations |
|---|---|
| Body of an earthworm is segmented, whereas body of human beings is not. |
What you learn in Theory:
Some animals show segmentation while others do not.
What you learn in Practice:
Earthworm has a repetition of organs.