- Primary source of food for people and animals
- Produce oxygen
- Help to keep us cool
- Renew the air
- Provide a home for wildlife
- Beauty surroundings
- Perfume the air
- Furnish buildinh materials and fuel
Part of a plant :
- Roots
- Shoots
ROOTS
- Not comprised of several organs like the shoot
- Made from many routs which spread out from under to shoot
- Holds the plant in the ground
- Prevents from being blown away or blown over in a strong wind
- Takes up water and mineral from the soil to help the plant make food and grow
3 Kind of Root System
- Tap Root System {example : carrots, potatoes, radish, parsley}
- Fibrous Root System {example : grass, lemon grass, clover, bamboo, ferns, coconut palm}
- Adventitious Roots {example : corn, orchid, coconut, mangrove tree}
Tap Root System
- has a thick central root
- grows deep into the soil
- has small lateral routs growing from it
Tap Root Shapes
- Conical shape, example : carrot
carrot is an example of conical tap root shape.
2. Fusifrom shape, example : radish
radish is an example of fusiform tap root shape.
3. Napiform shape, example : potato
Potato is an example of napiform tap root shape.
SHOOT
- Grows above the ground
- Comprises several organs
- Stem and its branches
- Major plants of the shoot ; ferminal bud, lateral bud, internode, node
- Terminal bud - tip of the shoot
- Lateral bud - sides of the shoot
- Node : region where the leaf and bud is found
- Internode : gap between two nodes
LEAVES
- helps to draw water through the plant from the roots
- makes food using the process of photosynthesis
Photosynthesis : process of converting light energy to chemical energy / process by which green plants make use of carbon dioxide and water to manufacture food in the presence of sunlight and chlorophyll.
STEM
Function :
- transport water and mineral from roots to the leaf
- movement of water and mineral from the roots upward and movement of manufactured food
- used for food storage & reproduction of plants involving cuttings
- green stems manufacture food just as leaves do
FLOWERS
- Contains the reproductive parts of the plant
- Differ in shape, size and color