plant tissue

Question 1

waxy cuticle

Answer 1

protective layer on top of leaf
prevents water from evaporating

Question 2

upper epidermis

Answer 2

thin and transparent layer
allowed light to enter palisade mesophyll

Question 3

palisade mesophyll

Answer 3

tightly packed with lots of chloroplasts
maximises photosynthesis

Question 4

lower epidermis

Answer 4

guard cells and stomata

Question 5

spongy mesophyll

Answer 5

contains air spaces
increase SA to volume ratio for diffusion of gases

Question 6

guard cell

Answer 6

allow Co2 to diffuse in and
o2 to diffuse out
opens and closes at night / day
protects internal tissues

Question 7

xylem

Answer 7

transports water in to lead for mesophyll cells to use in photosynthesis

Question 8

phloem

Answer 8

transports minerals, sucrose and amino acids

Question 9

photosynthesis equation

Answer 9

co2 + water -> glucose + oxygen

Question 10

what substance strengthens xylem walls

Answer 10

lignin

Question 11

adaptations of root hair cell

Answer 11

no chloroplasts
long projections

Question 12

structure of xylem

Answer 12

made of dead cells
contains lignin
do not have pores in their end walls
hollow
does not contain cytoplasm

Question 13

structure of phloem

Answer 13

made of living cells
have pores in their end walls
contains cytoplasm
does not contain lignin

Question 14

similarities of xylem and phloem

Answer 14

both tubular
both made of cells

Question 15

what is xylem involved in

Answer 15

transpiration

Question 16

what is phloem involved in

Answer 16

translocation