Movement is the ability of living organisms to move from one place to another.
Reasons for Movement
- To search for food
ii To escape from danger
iii. To respond to stimulus either positively or negatively
- For the sake of reproduction
CYCLOSIS
The cytoplasm as a whole of normally in motion. Irregular streaming often occurs but at other times, the contents of the cell are subjected contents of the cell are subjected to cynical currents moving constantly in one direction. This is known as cyclosis. The cellular organelles are swept along passively by these streams or current.
| Organisms | Organelles for movement | Mechanism of movement |
| Amoeba | Pseudopodia | Cytoplasmic streaming (cyclosis) |
| Paramecium | Cilia | Beating the cilia against water |
| Euglena | Flagellum | Lashing movement of flagellum |
| Hydra | Tentacles | Swimming, swaying, hoping and Somersaulting |
| Earthworm | Chaetae | Crawling |
| Fishes | Fins | Swimming |
| Toads and frog | Limbs | Hopping |
WEEK SEVEN
ASSIGNMENT
1a. What is meant by term tropism?
- How do plants response to the external stimulus of light
- explain what is meant nastic response
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