Reproduction in plants
Stages:
Pollination
Animals
Pollen grains are usually sticky so as to stick onto the insect's body
Petals must be colourful, big, bright, have a pleasant smell and nectar
Insects/ small animals
Wind
Small and dull petals, no sweet smell nor nectar
Feathery stigmas
Fertlisation
Formation of fruit and seeds
1) Petals will wither and drop off
2) Ovary swollens and develops into a fruit
3) The ovules become seeds
Meeting of the male reproductive cell and the female reproductive cell.
Process
Step 1: Upon landing on the stigma, each pollen grain produces a tube that grows down the style to the ovules in the ovary.
Step 2: When the pollen tube reaches the ovule, fertilisation takes place.
Dispersal
Water
Waterproof covering/Fibrous husk
e.g. coconut tree
Splitting
Ripen, dry up and split open
e.g. rubber tree
Wind
Dry and light/ Wing-like structures or hairs
e.g. Dandelion
Animals
Juicy or frangrant
e.g. hibiscus
Germination
Only possible if the seed lands in a place with sufficient air, water and the right temperature.
Means to sprout or grow
Main topic
Female Parts
Stigma
Captures the pollen
Style
Supports the stigma
Ovary
Responsible for housing the eggs
Male Parts
Filament
Supports the anther
Anther
Storing and producing pollen
Fun facts!
•Arrowroot, an antidote for poisoned arrows, is used as a thickener in cooking (so if you ever get shot with a poison arrow, do not go to a doctor, look in your kitchen cabinet.
•Asparagus is a member of the lily family, which also includes onions, leeks, and garlic
•Onions contain a mild antibiotic that fights infections, soothes burns, tames bee stings and relieves the itch of athletes foot.
•One bushel of corn will sweeten more than 400 cans of pop.
•Butterflies taste food by standing on top of it! Their taste receptors are in their feet unlike humans who have most on their tongue
•Butterflies attach their eggs to leaves with a special glue
■The world's biggest seed is the coco-de-mer nut, which can weigh up to 20kg (45lb).