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Seeds and Flowers. Plant reproduction. Plants without seeds. ☼ Use Spores for reproduction All Non-vascular plants- E.g. Phylum Hepatophyta (Liverworts) Phylum Anthocerophyta (Hornworts) Phylum Bryophyta (Mosses). Plants without seeds.

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Seeds and flowers

Seeds and Flowers

Plant reproduction


Plants without seeds
Plants without seeds

☼ Use Spores for reproduction

  • All Non-vascular plants-

    E.g. Phylum Hepatophyta

    (Liverworts)

    Phylum Anthocerophyta (Hornworts)

    Phylum Bryophyta (Mosses)


Plants without seeds1
Plants without seeds

2. Phylum Pterophyta (Ferns)

(spores in sporangia

on underside of fronds)

3. Phylum Psilophyta

(whisk ferns)

4. Phylum Lycophyta

(Club Mosses)

5. Phylum Sphenophyta

(Horsetails)


Plants with seeds
Plants with seeds

  • Gymnosperms:

    (Seeds in cones / scales)

    (“naked seeds”)

    a. Phylum Cycadophyta

    (Cycads E.g. Sago Palm)

    b. Phylum Gnetophyta

    (E.g. Ephedra, Welwitschia)


Plants with seeds1
Plants with seeds

2. Gymnosperms

c. Phylum Ginkgophyta

(Ginkgoes)

d. Phylum Coniferophyta

(Conifers)


Plants with seeds2
Plants with seeds

2. Angiosperms (Flowering plants)

Phylum Anthophyta

reproductive structure = flower

☼ seeds form

from flowers

inside fruit


Seeds
Seeds

Three parts:

  • Seed coat

  • Embryo

  • Endosperm

    (food storage)


Seeds1
Seeds

F(x)s =

Improve chances of reproductive success

  • Have a seed coat

    a. Protects embryo

    b. Prevents dehydration

    2. Contains food source for growing embryo

    (Endosperm)


Flowers
Flowers

  • All flower parts are modified leaves

  • F(x) –development & exchange of sperm (pollen) and eggs (ova)



Flower parts f x s
Flower Parts – F(x)s

  • Petals – attract pollinators

  • Sepals – protect bud

  • Anther-makes pollen

  • Filament – supports anther

  • Stigma – traps pollen

  • Style – supports stigma

  • Ovary – contains ova

    (eggs)


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