1/35
Name | Mastery | Learn | Test | Matching | Spaced |
---|
No study sessions yet.
pteridophytes include
horsetails and ferns
pteridophytes used as
medicine, soilbinders, ornamentals
soil binders
have roots to bind soil
prevent soil erosion
first terrestial plants to have vascular tissue
pteridophytes
habitat of pteridophytes
cool, damp, shady places
some flourish well in sandy soil
dominant phase of pteridophytes
sporophyte
sporophyte differentiated in roots stem and leaves
pteridophyte
well developed vascular system in
sporophyte of pteridophytes
types of leaves found in pteridophytes
macrophyll and microphyll
microphyll in pteridophyte example
selaginella and equisetum
macrophyll in pteridophyte example
ferns
sporangia
found on leaf- like appendages called sporophylls
sporophyll present on
sporophyte
strobili or cones
in some cases, sporophyll forms distinct compact structures
strobili or cones example
selaginella and equisetum
spore mother cells in sporangia
produce spores by meiosis
prothallus
spores germinate to give rise to inconspicuous, small but multicellular, free living, photosynthetic thalloid gametophyte called prothallus
gametophytes favourable condition to grow
cool, damp, shady place
water for fertilisation
spread of living pteridophyte restricted
due to their specific restricted requirement and the need for water for fertilisation, the spread of living pteridophyte is limited and restricted to narrow geographical area
antheridia and archegonia present on
gametophyte, prothallus
male gametes release
from antheridium, to the mouth of archegonia
fertilisation
in archegonium
zygote formation in
archegonium
zygote produces
well differentiated, multicellular dominant sporophyte
homosporus
plants in which spores are of similar kind
most pteridophytes and all bryophytes
heterosporus pteridophytes
selaginella, salvinia, azolla, marsilea
the precursor to seed habit
plant must be heterosporus
precursor to seed habit first originated
pteridophytes
male gametophyte
microspore
female gametophyte
megaspore
why heterosporus pteridophytes don’t produce seeds
the female gametophyte leaves main plant as soon as zygote formation occurs
classes of pteridophytes
psilopsida, lycopsida, sphenopsida, pteropsida
psilopsida ex
psilotum
lycopsida eg
selaginella, lycopodium
sphenopsida eg
equisetum
pteropsida eg
pteris, dryopteris, adiantum, pteridium, azolla, marsilea, salvinia