Leaves

Question 1

Structure of a leaf

Answer 1

• Cuticle/waxy layer
• Upper epidermis-transparent,covers
• palisade mesophyll-photosynthesis
• Lower epidermis-covers plant
• guard cells+stomata-transpiration

Question 2

Xylem function

Answer 2

Carries water
Roots->leaves
Transpiration
(Transpiration stream)

Question 3

Phloem function

Answer 3

Ions,glucose
Both directions
Glucose stored in roots
Translocation

Question 4

Xylem

Answer 4

Dead cells
Cell walls broken-one continuous tube
Strengthened and made waterproof by lignin(but it has holes/bordered pits)

Question 5

Phloem

Answer 5

Elongated cells with holes in cell walls(sieve plates)
Many organelles are removed
Translocation

Question 6

Meristem tissue is

Answer 6

Able to differentiate
Replace tissue
Plant growth

Question 7

Factors affecting transpiration

Answer 7

Increased Light-increased evaporation+more photosynthesis
Increased Temperature -more evaporation
Increased Wind-more diffusion
Increased Humidity-lower transpiration

Question 8

Aphids

Answer 8

Aphids suck all glucose from plant
Killing it
Ladybugs eat aphids-natural pest control