UW BIOL 162 - Angiosperm Reproduction: flowers. (4 pages)

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Angiosperm Reproduction: flowers.



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Angiosperm Reproduction: flowers.

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Pages:
4
School:
University of Washington
Course:
Biol 162 - GENERAL BIOLOGY
GENERAL BIOLOGY Documents

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Three differences between gymnosperms and angiosperms Angiosperm Reproduction flowers in reproduction Angiosperm ovules are protected within an enclosed structure rather sitting on a modified leaf Double fertilization in the angiosperms produces a diploid zygote and triploid endosperm nucleus L8 S1 There are generally hermaphrodite flowers and cross pollination between flowers is typical 70 Wind pollination is usual in the gymnosperms Animal pollination widespread in angiosperms Magnolia grandiflora L8 S2 Collective nouns that can cause confusion Basic structure of the angiosperm flower STAMEN male reproductive part CARPEL female reproductive part filament anther stigma style ovary This is a hermaphrodite flower with a single carpel Calyx The outer whorl of a flower made up of sepals that are usually green and protect the flower in bud Carpel Bears the stigma and frequently an elongated style and encloses the ovules sometimes gynaecium The megasporophyll of the flower Corolla The collective term for the petals of a flower OVULE forms within ovary petal all petals combined are the flower s corolla sepal all sepals combined are the flower s calyx Fig 28 2 p 495 receptacle L8 S3 L8 S4 More collective nouns that can cause confusion Ovary An ovary is a female reproductive organ in plants that produces ovules Ovule The female sex cells of flowering plants After the ovule is fertilized by the male pollen the ovule becomes a seed Pistil The central set of female reproductive organs The pistil is composed of one or more carpels and produces the ovule Perianth The floral envelope it includes the calyx and corolla Stamen The anther and its supporting filament The microsporophyll of the flower Plant of the day L8 S5 1 Wreaths of Damask like roses have been found in Egyptian tombs Minoan frescoes on Crete show roses and gold pins with single rose flower on the end were discovered at Knososs Nebuchadnezzar used roses to decorate his palace The Greeks associated roses with the



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