Lab 4 Flashcards
flowering plants
angiosperms
the primary photosynthetic organs for most plants
leaves
of some species have been adapted to store water, store starch
leaves
important players in gas exchange and in the water stream that flows upwards from the soil and transpires from the
leaves
three parts of a leave
: a blade, a petiole and a pair of stipules
the flat expanded portion of the leaf
blade
the stalk that supports the blade; in some plants it is absent
petiole
a sessile plant is
petiole-less
paired structures that may be found at the base of leaves. Their presence in many species is temporary since they are often shed early in the growing season; vary greatly
stipules
rhubarb pie is made from
petiole
to tell whether you are looking at a simple leaf or leaflet find the
axillary bud
axillary buds are only found in the
axil of a leaf
leaflets occuring in featherlike pattern
pinnately
leaflets arise from a single point
palmately
(xylem
water transfer
phloem
food flows down
areas on a stem that give rise to leaves or granches
nodes
one leaf at a node
alternate
number of leaves at a node is 2
opposite
3+ leaves at a node
whorled
veins in the stem which transport water and organic solutes
vascular bundles
parallel in
monocot
net veins in
dicot
a plant which lives in an environment with a moderate amount of water
mesophyte
covers the otuer surface of plants
dermal tissue
type of dermal tissue covering young and non-woody plant organs
epidermis
non-cellular layer that covers the upper epidermis
cuticle
cuticle is comprised of
cutin
purpose of cuticle is
retain water, slow down transpiration
bulk of all plant orgins, 14 sided multiprupose cell
parenchyma
middle layers of the leaf
mesophyll
one of the most abundant tissues in the plant and can be adapted for storage and/or photosynthesis
parenchyma
rectangle shaped cells
palisade
circular cells
spongy
conducting tissues of plants
vascular tissues
xylem are
vessel elements
xylem has walls of
lignin, secondary cell walls
phloem are
sieve tube members and companion cells
surrond and support he vascular bundle
bundle sheath cells
bundle sheath cells are
fiber
fiber is a type of cell in
sclerenchyma tissue
sclerenchyma tissue is the
support in plants
paired and smaller than epidermal cells, they let things come in and out
guard cells
space between guard cell pair
stoma
plant that lives in an arid environment
xerophyte
cells that fill with water and causes the leaf to uncurl
bulliform cells
nodes and axillary buds
are not the same
leaf composition
simple and compound, pinnately and palmately
bulk of plant cells are made of
parenchyma
guard cells are usually found (x) because (x)
on the lower epidermis because it is not in the sunlight
guard cells are always found by
a pocket of air
means mouth
stoma
xeric plants are curled so that
there is less surface for evaporatoin
in xeric plants the stoma are
not found on the surface
in xeric plants, helps keep water
Schlerncyma
in the mesophyll xeric plants
have more spongy, no palisade
in hydric the palisade
are bigger and more of
in hydric plants, the guard cells
are only on the epidermis
in hydric plants, there is (x) spongy
less
in hydric plants, (x) are for support
sclerids
in comparison to shade leaves, sun leaves have
more palisade, more spongy, more cuticle, higher shapre ratio, more stoma, more mass
