Photosynthesis

Question 1

chlorophyll

Answer 1

absorbs sunlight

Question 2

stomata

Answer 2

exit/entrance for O2, CO2, H20, bottom of leaf (cooler) decreasing risk of water loss

Question 3

palisade cells

Answer 3

lots of chloroplasts, large rectangles = high s.a., move depending on light intensity

Question 4

spongy mesophyll layer

Answer 4

air spaces for gases to diffuse

Question 5

leaves

Answer 5

broad, flat = high s.a., thin = short diffusion path

Question 6

waxy cuticle

Answer 6

prevents water vapour loss

Question 7

vascular bundle

Answer 7

vein transportation system, dissolved water and sugars via phloem and xylem vessels

Question 8

xylem vessel

Answer 8

transports water and nutrients from roots to stems/leaves

Question 9

phloem vessel

Answer 9

transports sugars from leaves to elsewhere

Question 10

importance

Answer 10

basis of food chains, chemosynthesis, maintain O2 + CO2 levels in atmosphere

Question 11

equation

Answer 11

6CO2 + 6H2O -> C6H1206 + 6O2

Question 12

endothermic or exothermic?

Answer 12

endothermic, taking energy in from surrounding environment