3.3: Describe the Structure of an Insect - Pollinated and a Wind - Pollinated Flower and Explain How each is Adapted for Pollination

STRUCTURES OF FLOWERS:

STRUCTURE	DESCRIPTION
SEPALS	Protects Unopened lower
PETALS	Brightly Coloured in Insect - Pollinated Flowers to Attract Insects
STAMENS	Male Part of the Flower, Consisting of Filament and Anther
FILAMENT	Positions Anther to Release Male Sex Cell (Pollen Grain)
ANTHERS	Produces and Releases the Male Sex Cell (Pollen Grain)
PISTILS	Female Part of the Flower, Consisting of Ovule, Ovary and Stigma
STIGMA	Top of the Female Part of the Flower which Collects Pollen Grains
OVARY	Produced the Female Sex Cell (Ovum)
NECTARY	Produces a Sugary Solution Called Nectar in Insect - Pollinated Flowers to Attract Insects

INSECT POLLINATED FLOWER: Flower that Requires Pollen to be Distributed by Insects

Diagram:

                                           

ADAPTATIONS

FEATURE	EXPLANATION
PETALS	Large and Brightly - Coloured to Attract Insects
SCENT AND NECTAR	Scented Nectar to Attract Insects
NUMBER OF POLLEN GRAINS	Moderate - Insects Transfer Pollen Grains Efficiently (High Chances of Pollination)
POLLEN GRAINS	Sticky and Spiky to Hang onto Insects
ANTHERS	Inside Flower, Stiff and Firmly Attached to Brush Against Insects
STIGMA	Inside Flower, Sticky so Pollen Grains Stick to it When an Insect Brushes Past

WIND POLLINATED FLOWER: Flowers that Require Pollen to be Distributed by Wind

Diagram:

 

ADAPTATIONS

FEATURE	EXPLANATION
PETALS	Small and Dull (Green or Brown) as they Do Not Need to Attract Insects
SCENT AND NECTAR	No Scented Nectar as they Do Not Need to Attract Insects
NUMBER OF POLLEN GRAINS	Large Amounts - Most Pollen Grains are Not Transferred to Another Flower (Increase Chances of Pollination)
POLLEN GRAINS	Smooth and Light so can Easily be Carried by Wind
ANTHERS	Outside Flower, Loose on Long Filaments to Release Pollen Grains Easily
STIGMA	Outside Flower, Feathery to Catch Drifting Pollen Grains