aice bio - unit 7

Casparian strip

band of “waxy” material (suberin) along the endodermis; PREVENTS WATER FROM TRAVELLING VIA THE APOPLAST PATHWAY

pith

a tissue in the stems of vascular plants

epidermis

“skin” of the plant; aerial parts secrete a waxy cuticle

endodermis

inner ‘skin’ layer separating the tissue layers

cortex

tissue of cells between the epidermis and the stele/vascular bundle

stele/vascular bundle

xylem & phloem; part of the transport system of the plant

monocot or dicot? what is it?

monocot root

monocot or dicot? what is it?

dicot root

monocot stem

vascular bundles scattered in cortex

dicot stem

vascular bundle in a ring; cortex outside bundles, pith in the middle

monocot or dicot? what is it?

monocot stem

monocot or dicot? what is it?

dicot stem

monocot or dicot? what is it?

monocot stem

monocot or dicot? what is it

dicot stem

monocot flowers

multiples of 3

dicots flowers

multiples of 4 or 5

monocot leaves

parallel veins

dicots leaves

net like veins

monocot or dicot? what is it?

monocot leaves

monocot or dicot? what is it?

dicot leaves

apoplast pathway

water enters and moves through the cell wall (intercellular spaces)

symplast pathway

water enters the cytoplasm and travels via the plasmodesmata

function of xylem

transport water around the plant, therefore must have little resistance to flow and be as open as possible

what is xylem made of?

made of dead cells with hard walls for support

what is lignin?

reinforces xylem, a strong and waterproof material

where is the xylem usually?

center of vascular bundle

xylem is usually … (size)`

bigger

apoplast pathway is blocked by the __________

casparian strip