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83645
Tracheophyta
Description
A-Levels Biology a2/2 (KINGDOM PLANTAE) Mind Map on Tracheophyta, created by ZC_ on 11/05/2013.
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biology a2/2
kingdom plantae
biology a2/2
kingdom plantae
a-levels
Mind Map by
ZC_
, updated more than 1 year ago
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Created by
ZC_
over 11 years ago
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Resource summary
Tracheophyta
Vascular plants
posses vascular tissue and grow to be large
Pteridophyta
FERNS
Structure of a fern
Dominent phase: sporophyte
Diploid plant
developed from a zygote
mature plant has true roots, a stem and leaves
underground stem - rhizome
leaflets - pinnae
leaves covered by cuticle and possesses stomata
sporangia develop on the underside of leaves
each cluster - sorus
protected by umbrella shaped cover - indusium
gametophyte develops from a spore
separate plant called a protallus
heart shaped structure
bears the gametangia
antheridium and the archegonium
anchored by rhizoids
production of gametes and fertilization
archegonia and antheridia produce eggs and sperm by mitosis
sperm released and swim in water into archegonia where fertilization of egg takes place
life cycle of a fern
meiosis and production of spores
spores are produced in sporangia by meoisis
spores released when annulus layer dries out and breaks open
dispersed by the wind
spore producing capacity enormous
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