Biology Questions and Answers
Pteridophytes
- What are the main
representatives of the
pteridophytes? Is this plant
group cryptogamic or
phanerogamic?
The better known ptferns and the maidenhairs, freridophytes are theom the
filicinae (filicopsida) group, and the
selaginellas, mosslike plalycopodineae group (lycopsida).nts from th e
Pteridophytes are cryptogamic plants,
i.e., they are flowerless and seedless.
- How different are
pteridophytes from
bryophytes regarding
substance transport?
Pteridophytes are tracheophyte
(vascular) plaspecialized in conduction onts, i.e., they havf water ande tissues
nutrients. Bryophytes are nonvascular
plants. In pteridophytes thsubstance transport is done througherefore the
vessels and in bryophytes that transport
occurs by diffusion.
- Why are pteridophytes
better adapted to dry land
than bryophytes? Were
pteridophytes always less
abundant than phanerogamic
plants?
Although bryophytes and pteridophytes
have waterfecundation t-dependant gametes fohe emergence of r
conductive vessels in this last group
facilitated lifenvironment. The conductive ve in a terrestrial (^) essels of
the pteridophytes collmoist soil and distribute it to thect water e cells.from the
Bryophytes do not have this option and
they depend entirely oreaches the aerial part of the plant andn the water that (^)
so they need to live in humid or rainy
places.
Before the ascension of the
phanerogamic plants (plapresent seeds) the pteridophytes wnts that (^) ere
the plants that predominated in the
terrestrialpteridophyte forests of the environment. The large
Carboniferous period (named after the
pteridophytes) are responsible formation of coal deposits, mainly ifor then
Europe, Asia and North America; the
Carboniferous pe290 and 360 million years ariod occurred betweengo and is
part of the Paleozoic era.
- What is the evolutionary
importance of pteridophytes?
As the first tracheopteridophytes were also thphytes, (^) e first plants
to extensively colonize the terrestrial
environment forming forests. They also
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