Transport in plants

Question 1

draw a digram of a leaf, stem root

Answer 1

1. xylem on top, phloem below
2. phloem on outside then cambium then xylem
3. xylem in x in middle and phloem in gaps

Question 2

xylem:

Answer 2

dead elongated cells
no end walls
lignified with lignin spiral (to increase flexibility and provide support)
pits (allow lateral movement of water)
parenchyma (store food and tannin)

Question 3

phloem

Answer 3

sieve tube elements
sieve plates
companion cells joined by plasmodesmata
scurried cells (support)

Question 4

adaption of xerophytes:

Answer 4

waxy cuticles
sunken stomata
low numbers of stomata
rolled leaves
hairy leaves
wide/deep roots
reduced leaf numbers

Question 5

adaptions of hydrophytes

Answer 5

little waxy cuticle
many stomata (allow access to CO2)
wide/broad leaves (increased surface area)
short/simple root system(not needed to obtain water)
reduced structure
air spaces (allow leaves to float for light for photosynthesis)