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40 terms

Biology 101 Quiz 2

STUDY
PLAY
petiole
attaches blade of leaf to stem
no petiole
sessile (grasses)
compound leaf
has many leaflets (blades) coming of a single petiole
node
area which petiole of leaf grows off the stem
phototropism
petiole's ability to twist to light
venation
pattern of veins within leaf
midrib
main vein down center (if present)
veins purpose
pipeline for transporting sap/water
epidermal
protects and covers. it is thin and covered by waxy cuticle (holds in water)
cork (bark)
protection for woody plants
parenchyma
makes and stores food
support
thick cells and fiber
vascualr tissue
tube like cells in veins
xylem
move water/minerals upward from roots
phloem
move sap/food downward from leaves
meristematic tissue
growing tissue
longitudinal growth
apicable meristem at root/stem tips
cambium
growth in diameter
vascular
new xylem and phloem
epidermis
covered by cuticle
stomata
pores on bottom; permits air to enter/leave; transpiration
transpiration
excess water leaves
leaf hairs
slow air flow /water loss
mesophyll
parenchyma layer
palisade
(upper) colums like cells; site of most photosynthesis-chlorophyll
spongy layer
(lower) large air spaces between cells; provides air for photosynthesis
nucleus
genes
cytoplasm
organelles
cell wall
cellulose and lignin
large vacuole
storage
chloroplasts
chlorophyll
photosynthesis
putting together of light; process whereby a green plant is able to capture radiant energy of sunlight and convert it into the chemical energy of food.
green
chlorophyll pigment in chloroplasts
process of photosynthesis
water enter chloroplast in leaf and is exposed to sunlight; suns energy split to the hydrogens off the water and releases oxygen as byproduct; water is converted into 2 other compounds in via stomata and air apaces of spongy layer; result is glucose/sugar
Why make glucose?
provide energy for plant cells to live and work; extra glucose is linked together into starch and stored in the plant which we eat
cellular respiration
glucose is burned for energy
Why leaves fall?
shortened days in fall; lower temperature; abcission layer; enzymes release at base of petiole; cellulose weakened
cork
leaf scar
Water and Wilting
influenced by temperature; water available in soil; windspeed across leaves (hairs present); air humidity
turgor
water pressure