plant tissues

Question 1

what is the wax cuticle

Answer 1

protective layer on the leaf which prevents water from leaking

Question 2

how is the upper epidermis

Answer 2

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

Question 3

what are palisade mesophyll

Answer 3

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

Question 4

spongy mesophyll

Answer 4

contains internal air spaces that increases surface area to volume ratio for the diffusion of gases

Question 5

lower epidermis

Answer 5

contains stem cells and stomata

Question 6

guard cell

Answer 6

absorbs and loses water to open and close the stomata to allow carbon dioxide to diffuse in, oxygen to diffuse out

Question 7

stomata

Answer 7

where gas exchange takes place., opens during day and closes during the night
evaporation of water also takes place

Question 8

where is stomata on most plants and why

Answer 8

much greater concentration on the underside of the leaf to reduce water loss

Question 9

phloem

Answer 9

transports sucrose and amino acids around the plant