Basis Of Classification
Chapter Name : Animal Kingdom |
Sub Topic Code : 103_11_04_01_06 |
Topic Name : Basis Of Classification |
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Sub Topic Name : Notochord |
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Introduction
In some animals, a rod-like structure is formed on the dorsal side of the body from the mesoderm during embryonic development.
Pre-Requisites:
Levels of organization. What are triploblasts & diploblasts.What is coelom?
Activity:
Place some Rheo leaf in boiling water.This kills the cells Put a solution of sugar or salt on the mounted leaf and observe. It shows the osmosis ability and signifies the function of cell wall
Real Life Question:
Is such a structure formed in all the animals, if so, does it stay for lifetime?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Chordates Non-chordates | Animals with notochord. Animals lacking notochord. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Peel of Rheo Leaf under microscope and solution of sugar or salt | Understanding that every living cell undergoes osmosis. |
Places to visit :
Biology Laboratory
Practical examples around us
| Examples | Explainations |
|---|---|
| Notochord is present in human embryo, but transforms to the vertebral column as they grow into adults. |
What you learn in Theory:
What is notochord and how animals can be classified on the basis of presence or absence of it.
What you learn in Practice:
Humans are chordates because they have a notochord during embryonic stage.