1. biolab exam 1002

which is the mesophyte

which is the xerophyte

which is the hydrophyte

cuticle layer

The waxy layer outside the epidermis protects structure

palisade mesophyll

rectangular cells that are filled with chloroplast and are involved with photosynthesis

spongy mesophyll

oddly shaped cells that aid in gas exchange aka parenchyma

stomata

pathway for gas exchange regulated and protected by guard cells

gaurd cells

flank the opening of the stomata and regulates opening and closing

vascular bundles

clumps of thick walled xylem cells and thin walled pholem cells, carry water, minerals and nutrients.

xylem cells

cells that transport water

pjloem cells

cells that transport sugars

concurrent exchange

declining gradient, fluid flows in same direction, theoretical process

countercurrent exchange

constant gradient, two flows in opposite directions, occurs organically in nature.

concurrent exchange graph

countercurrent exchange

define transpiration

The loss of water in plant leaves from evaporation causes all water to be pulled upwards in the plant.

heats effect on transpiration

rate increases, higher evap rate and movement through plant

inc humidty effect on transpiration

rate decreases, water vapour gradient decreases,

dec humidty effect on transpiration

rate increases, water vapour gradient increases

darkness’s effect on transpiration

rate dec, stomata closes in the dark, and therefore less transpiration occurs

inc air movement

rate inc, moves saturated air around the leaf and therefore creates a higher difference in water vapor concentration

dec surface area

rate dec, less stomata to perform transpiration