leaf structure

Question 1

wax cuticle

Answer 1

protective layer on leaf, prevents water from evaporating

Question 2

upper epidermis

Answer 2

thin and transparent to allow light to enter palisade mesophyll layer underneath it

Question 3

palisade mesophyll

Answer 3

column shaped cells tightly packed. with chloroplasts to absorb more light, maximising photosynthesis

Question 4

spongey mesophyll

Answer 4

contains internal air spaces that increase SA:V ratio for diffusion of gases

Question 5

lower epidermis

Answer 5

contains stomata and guard cells

Question 6

guard cell

Answer 6

absorbs and loses water to open and close stomata to allow CO2 to diffuse in, oxygen diffuse out

Question 7

stomata

Answer 7

gas exchange takes place: opens during day, closes during night

Question 8

vascular bundle

Answer 8

contains xylem and phloem to transport substances to and from leaf

Question 9

xylem

Answer 9

transports water. into leaf for mesophyll cells to use in photosynthesis and transpiration in stomata

Question 10

phloem

Answer 10

transports sucrose and amino acids in the plant

Question 11

role of Mg

Answer 11

needed to make chlorophyll

Question 12

role of Nitrate

Answer 12

amino acids to bring proteins

Question 13

deficiency of Mg

Answer 13

yellowing between veins of leaves (CHLOROSIS)

Question 14

deficiency of Nitrate

Answer 14

stunted growth and yellowing of leaves