How are new plants formed?• from seeds (sexual reproduction)
• by producing things such asbulbs or tubers (asexual reproduction).
Structure of a flowering plant
• The leaves — these use light energy, carbon dioxide and water to make food by photosynthesis.
There are four main organs of a flowering plant :
• The flower - contains the reproductive organs.
• The stem — this provides support and a transport system for water and minerals to the leaves and flowers and to transport food from the leaves to the roots.
• The roots — these anchor the plant to the ground and absorb water and minerals.
The parts of a flower
Petals attract insects.Sepals protect the bud until it opens.
Stamens make pollen. Pistil is the female organ
Stamen (male)• Anther: pollen grains
grow in the anther.
When the grains are fully grown, the anther splits open.
Cross pollination - pollination istransferred from the male partof one plant to the femalepart of another plant.
Self pollination -pollen is transferred from the male partof a plant to the female partof the same plant.
Wind Pollination
These plants typically do NOT have brightly colored flowers.
Examples include trees and grasses.
Pollination
Regardless of the type, the process is the same.
The pollen settles on the stigma, and a pollen tube grows to the ovary.
DOUBLE FERTILIZATION
One sperm joins withone egg to form anembryo plant.
One sperm joins with two polar cells to become endosperm(stored food).
(within the ovule)