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Plants: Sexual Reproduction
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The Flower: Parts
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The Flower: Parts
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The Flower: Parts
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The Flower: Parts
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Flower Parts and Function
Receptacle Supports all the parts of the flower Sepals Protect the flower bud before it blooms
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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
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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
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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
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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
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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
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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
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Pollination: Flowers Flowers: Reproductive plant structures containing the male and/or female reproductive organs of the plant. They are also used to attract pollinators
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Pollinators Bats Bees Beetles Birds Butterflies Flies Moths
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Cross-pollination:
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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)
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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
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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
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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
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Assignment Flower Poster: Include parts (10 marks), function (10 marks) and color (5 marks) Next class: Flower quiz parts and function
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