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Evolution of Vascular Tissue - Coggle Diagram
Evolution of Vascular Tissue
From Nonvascular to Vascular Tissue
Major
impacts
on
evolution
terrestrial biology
facilitating
plants
with
increased
stature
photosynthetic output
ability to colonize
greatly
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Three
essential
functions
vascular system
1
delivery
of
resources
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water
essential nutrients
sugars
amino acids
2
mechanical support
3
communication
within
the
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land plants
degree
of modifications
of
transport cells
increases
from
nonvascular
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Hydroids
progression
water-conducting
parenchyma cells
started
with
water-conducting
cells
more
specialized
hydroids
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hydroids
elongated
lack
lignin
secondary wall thickenings
similiar
to
trachieds
thin-walled
lack
helices
thickenings
typical
of
trachieds
three
major
differences
hydroids
of
byrophtes
lack
secondary wall
patterns
ligning-like
polymers
not
cell-specific
protect
gainst
microbes
collapse
during
water
stress
highly
resistant
to
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trachieds
vessels
tracheophytes
Leptoids
parenchyma
specialized
into
leptoids
associated
with
parenchyma
albuminous cells
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compose
leptome
similar
to
phloem
sieve
cells
protophloem cells
of
tracheophytes
more
common
than
realized
cross-section
resembles
unspecialized
parenchyma cells
unstained
distinct
by
vertical
section
elongate
shape
slightly
oblique
end walls
at
maturity
nucleus
degenerates
as
in
phloem
sieve
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protoplasm
remains
Mosses
no
true
vascular tissue
development
has
begun
with
evolutionary precursors
leptoids
present
in
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hydroids
central
strand
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undergo
various
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deaf
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wall
thickened
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stereids
elongate
thick-walled
slender
fiberlike
cells
add
support
to
stem
araanged
in
cylinder
sround
hydrome