Year 11 Biology December MS week 2
3. (a) (i) light (intensity) 1
(ii) any one from:
• same mass/amount of grain produced when more (magnesium)
provided
• same mass / amount of grain at 0.1 and 0.15g 1
(iii) magnesium used for chlorophyll (production) 1
for photosynthesis 1
(b) extra cost (of fertiliser) not matched by (much) extra productivity 1
accept not cost effective or waste of money / fertiliser
accept answers relating to effect of leaching [5]
4. (a) oxygen, 2
carbon dioxide or water (vapour)
for 1 mark each
(b) idea of more air per breath/deeper breaths 1
(c) (i) respiration 1
(ii) carbon dioxide, 2
water
(iii) more energy required, 2
for increased muscular activity [8]