leaf
leaves
leaves are attached to the stem by a stalk or petiole
dycots leaf- has network veins
monocot leaf- prallel veins
seeds are easy to split in half
seeds are hard to split
layers of leaves
wax cuticle
upper epidermis
mesophyll layer
its transparent to let light to enter
pallisade mesophyll
spongy mesophyll
cells are narrow to have the maximum number of cells to be there
contains chloroplast
chloroplast also present here
called spongy because theres alot of air space between them and they dont have a regular shape
lower epidermis
has guard cell
guard cells has chlorohyll
has stoma
it allows the diffusion of gasses
the "nose" of the leaf
prevents water from evaporating out of the leaf
stoma= 1 stoma stomata= 2 or more stoma
how leafs are adapted for sunlight absorbtion
broad and flat surface
position of exchange
large surface area
vascular bundle
contains xylem and phloem veseles to help transport substances throught the plant
they will swell up when they absorb water. this opens the stomatas to allow gas exchange.
definition- tiny pores in the epidermis
nutrition
magnesium
for the manifacture of chloroplast
nitrogen
for the manifacture of protein, nuclic acid , and plant hormons
deficency will lead to bad growth
deficentcy will lead to yellow leaves