Plant Structure

Question 1

flower

Answer 1

pollination = reproduction

Question 1

leaf

Answer 1

site of photosynthesis

Question 2

root

Answer 2

stabilises plant and uptakes water/ mineral ion

Question 3

stem

Answer 3

stabilise plant and transport water/ molecules

Question 4

cuticle

Answer 4

prevents water loss

Question 5

upper epidermis

Answer 5

clear, allowing light through

Question 6

palisade mesophyll layer

Answer 6

rectangular = more fit in a row, chloroplasts, top of leaf

Question 7

spongy mesophyll layer

Answer 7

air spaces for gases to diffuse

Question 8

guard cells

Answer 8

close and open stomata

Question 9

xylem

Answer 9

tubes with open lignin, carrying water from roots to stem

Question 10

phloem

Answer 10

tubes, translocating dissolved sugars from leaves to plant

Question 11

vascular bundle

Answer 11

transport system of thin tubes

Question 12

transpiration

Answer 12

evaporation of water from leaves

Question 13

transpiration steps

Answer 13

water in soil, enters root hair cells, up xylem vessel due to pressure gradient, evaporates through the mesophyll layer to the stomata

Question 14

effect of light on transpiration

Answer 14

increased width of stomata = higher intake of O2 + evaporation of water

Question 15

effect of temperature on transpiration

Answer 15

increases rate of diffusion

Question 16

humidity

Answer 16

creates an equal pressure gradient = decreases transpiration rate

Question 17

wind

Answer 17

increases diffusion/ removal rate of water vapour