Chapter 2 - Organisation (currently plants only)

Question 1

draw and label the structure of a leaf

Question 2

function of epidermal tissue

Answer 2

protects surface of leaf

Question 3

adaptation of epidermal tissue

Answer 3

transparent - allows light to pass through to photosynthetic cells below

Question 4

function of waxy cuticle

Answer 4

reduces the evaporation of the water from surface of the leaf
prevents leaf from drying out

Question 5

function of stomata

Answer 5

allows carbon dioxide to enter leaf
allows oxygen to leave the leaf

controls the amount of water vapour that can pass out of leaf

Question 6

where is stomata found

Answer 6

in the lower epidermis

Question 7

where are guard cells found

Answer 7

on either side of the stomata

Question 8

function of palisade mesophyll

Answer 8

contains palisade cells packed full of chloroplasts

main site for photosynthesis

Question 9

function of spongy mesophyll

Answer 9

full of air spaces
allows for diffusion of gases

Question 10

what is chlorophyll made of

Answer 10

made using magnesium

Question 11

how can sugars transported by the phloem tissue be used

Answer 11

immediately (glucose)
are stored (starch)

Question 12

function of meristem tissue

Answer 12

contain stem cells which can differentiate into different types of plant tissue

Question 13

where is meristem tissue found

Answer 13

at growing tips (shoots, roots)

Question 14

what is special about stem cells

Answer 14

they can differentiate to form different types of plant tissues

Question 15

describe the transpiration stream

Answer 15

Question 16

what factors affect the rate of transpiration

Answer 16

• light intensity
• air movement
• temperature
• humidity