97 terms

Set 11: Leaves

STUDY
PLAY
photosynthesis and gas exchange
what are two functions of leaves?
sheath
what attaches a blade to the stem of a monocot?
sheath
what functions as part of the stem in a monocot?
blade
what is the expanded portion of a leaf that absorbes light and performs photosynthesis?
axillary bud
what defines the start of a leaf at the stem of a dicot?
no
is the axillary bud part of the leaf?
petiole
what attaches a blade to the stem of a dicot?
petiole
what functions as part of the stem in a dicot?
no
do gymnosperms have blades?
reduced leaves
what type of leaves do gymnosperms have?
needles and scales
give two examples of gymnosperm leaves
fasicle
what is the structure that attaches needles to the stem of a gymnosperm?
preventing water loss and withstanding bad external conditions
what is an advantage of reduced leaves?
surface area
what reduces to prevent water loss in a gymnosperm leaf?
center
where are the veins located in a gymnosperm leaf?
decreased surface area, centered veins, and thick cuticle
what are the three ways gymnosperm leaves have modified to prevent water loss?
parallel venation
what is the venation pattern in monocots?
netted venation
what is the venation pattern in dicots?
netted venation
veins highly branched to form network
pinnate netted venation
what is the type of venation where the main veins are attached like vanes on a feather and branch to form a network?
palmate netted venation
what is the type of venation where the main veins arise from a single common point, then branching to form a network?
simple dicot leaf
what type of dicot leaf has its blade in one piece?
compound dicot leaf
what type of dicot leaf has its blade divided into leaflets?
palmately compound leaf
what type of dicot leaf has leaflets that arise from a single point?
once pinnately compound leaf
what type of dicot leaf has leaflets arranged like the vanes on a feather?
pinna
individual leaflet
pinnae
multiple leaflets
twice pinnately compound leaf
what type of dicot leaf has leaflets divided into pinna and those pinna arranged like vanes on a feather? (leaflets branching out on branched leaflets)
phyllotaxy
arrangement of leaves on a stem
alternate
the phyllotaxy where there is 1 leaf per node
1
how many leaves per node when the phyllotaxy is alternate?
opposite
the phyllotaxy where there are 2 leaves per node
2
how many leaves per node when the phyllotaxy is opposite?
whorled
the phyllotaxy where there are >2 leaves per node
>2
how many leaves per node when the phyllotaxy is whorled?
bud scales
what type of modified leaves offer protection for the juvenile tissue?
spines
what type of modified leaves offer protection for the plant?
tendrils
what type of modified leaves offer support for the plant?
stipules
what type of modified leaves offer protection and carry out photosynthesis for the plant?
stipules
what type of modified leaf is characterized by small leaflets at the base of the petiole?
bulb
what type of modified leaf provides storage for the plant (ex: onion)?
succulent
what type of modified leaf provides storage for the plant (ex. aloe)?
water holding tank
what type of modified leaf provides water storage for the plant?
insect trap
what type of modified leaf captures prey for the plant in order to acquire nutrients?
bract
what type of modified leaf attracts pollinators for the plant?
bract
what type of modified leaf is characterized as being bright and surrounding a reduced flower?
reproductive
what type of modified leaf is for reproduction?
bryophyllum
a reproductive leaf where buds form along the leaf margin
protection
what is the function of the upper and lower epidermis?
lower epidermis
which epidermis has more stomates?
guard cells
what type of cells regulate stomates?
epidermis
what tissue possesses epidermal cells and guard cells?
cuticle
the external waxy layer made of cutin
cuticle
what slows evaporation and sheds water for the epidermis?
lower epidermis
is the cuticle thinner on the upper epidermis or the lower epidermis?
palisade mesophyll
what is another name for palisade parenchyma?
photosynthesis
what is the function of palisade mesophyll/parenchyma?
palisade parenchyma
what is another name for palisade mesophyll?
upper epidermis
which epidermis is the palisade mesophyll/parenchyma closer to?
spongy mesophyll
what is another name for spongy parenchyma?
spongy parenchyma
what is another name for spongy mesophyll?
photosynthesis
what is the function of spongy mesophyll/parenchyma?
palisade mesophyll
what are the rectangular cells are beneath the upper epidermis?
palisade mesophyll
what type of cells are lined up in rows?
yes
are there chloroplasts in the palisade mesophyll/parenchyma?
spongy mesophyll
what are the irregularly shaped cells above the lower epidermis?
spongy mesophyll
what type of cells are separated by large intercellular spaces filled with air and water?
yes
are there chloroplasts in the spong mesophyll/parenchyma?
photosynthesis
what is the function of a bundle sheath?
bundle sheath
what is the single layer of parenchyma cells surrounding a vein?
xylem
what conducts water and minerals in a leaf?
xylem
what is the uppermost layer of vascular tissue in a leaf vein?
phloem
what translocates food in a leaf?
phloem
what is the lower layer of vascular tissue in a leaf vein?
stomates
what are pores in a leaf surrounded by guard cells that control its aperature size?
gas exchange
what occurs at a stomate when it is open?
water vapor, oxygen, and carbon dioxide
what are the gases exchanged at a stomate?
day
during what time are stomates open for most plants?
night
during what time are stomates closed for most plants?
open
if turgor pressure is high, will the stomate be open or closed?
closed
if turgor pressure is low, will the stomate be open or closed?
abscisic acid
what causes stomates to be closed day and night during a drought in order to prevent water loss?
night
when are stomates of desert plants open?
day
when are stomates of desert plants closed?
xerophyte leaves
what type of leaves are modified to survive dry conditions?
xerophyte leaves
what type of leaves have additional cell layers?
xerophyte leaves
what type of leaves have less internal air spaces?
xerophyte leaves
what type of leaves have sunken stomates?
water storage
what is the function of xerophyte leaves?
flotation
what is the function of hydrophyte leaves?
hydrophyte leaves
what type of leaves are modified to survive wet conditions?
hydrophyte leaves
what type of leaves have fewer cell layers?
hydrophye leaves
what type of leaves have more internal air spaces?
mesophyte leaves
what type of leaves are suited for normal conditions?
mesophyte leaves
what type of leaves have an average number of cell layers?
mesophyte leaves
what type of leaves have an average number of internal air spaces?
gas exchange
what is the function of mesophyte leaves?