floweringplants

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Published on January 12, 2008

Author: Raimondo

Source: authorstream.com

Reproduction in Flowering Plants:  Reproduction in Flowering Plants A collection of slides to teach Key Stage 2 Science Unit 5B Life Cycles. Children will learn to name and explain the functions of some parts of a flower; describe the processes of pollination, fertilisation, seed dispersal and germination. © Diane Hawkins Clipart from Printmaster Gold and graphics by kind permission from PC Advisor - 10,000 Clipart March 1999 Cover CD ROM The Parts of a Flower:  The Parts of a Flower Most flowers have four parts: sepals, petals, stamens, carpels. The parts of a flower:  The parts of a flower Sepals protect the bud until it opens. Petals attract insects. Stamens make pollen. Carpels grow into fruits which contain the seeds. Stamen (male):  Stamen (male) Anther: pollen grains grow in the anther. When the grains are fully grown, the anther splits open. Pistil (female):  Pistil (female) Stigma Style Carpel (ovary) Ovules (eggs) Pollination:  Pollination Flowering plants use the wind, insects, bats, birds and mammals to transfer pollen from the male (stamen) part of the flower to the female (stigma) part of the flower. Pollination:  Pollination A flower is pollinated when a pollen grain lands on its stigma. Each carpel grows into a fruit which contains the seeds. Fertilisation:  Fertilisation Pollen grains germinate on the stigma, growing down the style to reach an ovule. Fertilised ovules develop into seeds. The carpel enlarges to form the flesh of the fruit and to protect the ovary. Wind pollination:  Wind pollination Some flowers, such as grasses, do not have brightly coloured petals and nectar to attract insects. They do have stamens and carpels. These flowers are pollinated by the wind. Seed dispersal:  Seed dispersal Seeds are dispersed in many different ways: Wind Explosion Water Animals Birds Scatter How birds and animals help seed dispersal:  How birds and animals help seed dispersal Some seeds are hidden in the ground as a winter store. Some fruits have hooks on them and cling to fur or clothes. How birds and animals help seed dispersal:  How birds and animals help seed dispersal Birds and animals eat the fruits and excrete the seeds away from the parent plant.

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