Plants: Sexual Reproduction

The Flower: Parts

The Flower: Parts

The Flower: Parts

The Flower: Parts

Flower Parts and Function Receptacle Supports all the parts of the flower Sepals Protect the flower bud before it blooms

Flower Parts and Function Receptacle Supports all the parts of the flower Sepals Protect the flower bud before it blooms Petals Advertize reward for pollinators Anther A sac like structure that contains pollen

Flower Parts and Function Receptacle Supports all the parts of the flower Sepals Protect the flower bud before it blooms Petals Advertize reward for pollinators Anther A sac like structure that contains pollen Filament Holds the anther up so the pollen can spread

Flower Parts and Function Receptacle Supports all the parts of the flower Sepals Protect the flower bud before it blooms Petals Advertize reward for pollinators Anther A sac like structure that contains pollen Filament Holds the anther up so the pollen can spread Stigma The part of the female flower that catches pollen Style Holds up stigma

Flower Parts and Function Receptacle Supports all the parts of the flower Sepals Protect the flower bud before it blooms Petals Advertize reward for pollinators Anther A sac like structure that contains pollen Filament Holds the anther up so the pollen can spread Stigma The part of the female flower that catches pollen Style Holds up stigma Ovary Contains the ovules Ovule The egg

Sexual Reproduction Sexual Reproduction: Producing a new individual via the combination of genes from two different individuals. Benefits: Increase diversity of the population: If environmental conditions change it will be more likely that some will have the right set of genes to survive the new conditions More varieties of plant products = greater variety for market = increased sales

Pollination Pollination: The transfer of pollen of one plant to the pistil of a different individual of the same type of plant. The plant form of sexual reproduction. Benefits: Mixes the genes of two different individuals. Passes good genes around Can block ‘bad’ genes from being expressed

Pollination: Flowers Flowers: Reproductive plant structures containing the male and/or female reproductive organs of the plant. They are also used to attract pollinators

Pollinators Bats Bees Beetles Birds Butterflies Flies Moths

Cross-pollination:

Cost of Pollinators Pollinators need a reason to visit the flower Plant can give a reward Plants can trick the pollinator Types of rewards: Pollen Nectar False Rewards Imitate dead animal (attracts flies) Imitate female wasp (Attracts male wasps)

Flower Colors and Pollinator Color and size of petals matches the vision of their pollinators Eg. - Bats and moths are usually active at night so the flowers they pollinate are white. These are easy to see at night - Birds are attracted to red so flowers that are pollinated by them have adapted red leaves

Fruits Fruits: Structures used to disperse the seeds. Two types: Importance of fruits: Move seeds away from parent plant to limit competition between baby and parent. Dry Fleshy Dispersed by wind Eg. Dandelion Dispersed by animals Eg Blue Berry

Wind Pollination Wind Pollination: Occurs when the wind blows the pollen grains from one plant onto the pistil of the same type of plant Examples: Corn, Wheat and other grains

Assignment Flower Poster: Include parts (10 marks), function (10 marks) and color (5 marks) Next class: Flower quiz parts and function