Organisms Show Variety In Cell Number, Shape And Size
Chapter Name : Cell-Structure And Functions |
Sub Topic Code : 103_08_08_02_01 |
Topic Name : Organisms Show Variety In Cell Number, Shape And Size |
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Sub Topic Name : Organisms Show Variety In Cell Number, Shape And Size |
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Introduction
Cell - structural and fundamental unit of a living body. Different organisms have different cells performing different functions.
Pre-Requisites:
What are cells? Is there variety in cell number,shape and size in different organisms? How?
Activity:
Videos which show how different plant and animal cells are. Also the cells in human are much more modified and advanced to perform various functions.
Real Life Question:
IS a cell of a plant different from cell of an animal?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Plant cell | Cell wall and plastids are present. There is a cell membrane too. They are rectangular in shape. Cells contain chloroplasts, to make food. Cilia is absent. |
| Animal cell | Cell wall and plastids are absent, there is only a cell membrane. No chloroplasts are present, They are round in shape which have cilia, one or more vacuoles are present. Centrioles are present too. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Microscope | Observing plant and animal cell under microscope, we can see the difference between the two. |
Practical examples around us
| Examples | Explainations |
|---|---|
| Chloroplasts. | Animals don't have chloroplasts present int hier cells because we don't make our own food. |
What you learn in Theory:
The differences between cells in different organisms.
What you learn in Practice:
Why cells of certain organisms have special features and others don't.