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

GENERAL STRUCTURE OF FLOWERS:

STRUCTURE	DESCRIPTION
SEPALS	Leaf-shaped structure on the outermost part of flower that protects unopened flower
PETALS	Brightly coloured leaves surrounding the reproductive part of flower to attract pollinators (e.g, insects)
STAMENS	Male part of the Flower composed of the Filament and Anther
FILAMENT	Slender stalk supporting the Anther to make it accessible to pollinators (e.g, insects)
ANTHERS	Lobes on top of the Filament that produces the male gamete of flowering plant - Pollen
PISTILS	Female part of the Flower composed of the Stigma, Style, Ovule
STIGMA	Sticky, receptive tip of the Pistil that is responsible for catching Pollen
STYLE	Tube-shaped connection between Stigma and Ovule that elevates Stigma to catch Pollen
OVULE	Structure that contains female reproductive cells which develops into Seed after fertilisation

*INSECT POLLINATED FLOWER: Flower that distributes Pollen via Insects

Diagram:

Diagram showing the Structure of Insect-Pollinated Flower

ADAPTATIONS

FEATURE	EXPLANATION
PETALS	Petals are large and brightly-coloured to attract Insect pollinators
SCENT AND NECTAR	Nectar is scented to attract Insect pollinators
NUMBER OF POLLEN GRAINS	Moderate amount of Pollen grains due to insects being efficient pollinators
POLLEN GRAINS	Pollen grains are Sticky and spiky to attach to Insect
ANTHERS	Anthers that produce Pollen are stiff and firmly attached to Filaments inside of Flower to brush against Insects
STIGMA	Stigma is sticky and inside the Flower to catch Pollen when brushed against Insect

*WIND POLLINATED FLOWER: Flower that distributes Pollen via Wind

Diagram:

Diagram showing the Structure of Wind-Pollinated Flower

ADAPTATIONS

FEATURE	EXPLANATION
PETALS	Petals are small and dull (Green or Brown coloured) as they do not need to attract insects
SCENT AND NECTAR	Nectar is not scented as they do not need to attract insects
NUMBER OF POLLEN GRAINS	Large amounts of Pollen to increase chances of pollination
POLLEN GRAINS	Pollen grains are smooth and light to be easily carried by wind
ANTHERS	Anthers that produce Pollen are loosely attached to long Filaments outside of Flower to easily release Pollen via wind
STIGMA	Stigma is feathery and outside the Flower to catch drifting Pollen grains