O-LevelBiologyCell Biology5090/21 · May/June 2020 · Q810 Marks
List the structures within a plant leaf that do not possess chloroplasts.
- (a)List the structures within a plant leaf that do not possess chloroplasts.[4]
- (b)(i)Explain the importance to a plant of guard cells[4]
- (b)(ii)root hair cells.[2]
Mark scheme
Marking points from the official mark scheme (May/June 2020). The mark or mark type is shown in brackets.
- [4] cuticle; epidermis; xylem; phloem;
- [4] control the size / opening and closing ; of stomata; (linked to) water loss / transpiration ; (allow) exchange of O2 and CO2 ; for respiration (or process described) ; and photosynthesis (or process described) ;
- [2] for uptake of water ; ions; oxygen; large surface area;
Write your answer and get it marked
On Oracle Prep you can write or photograph your own answer and have it marked by AI against this mark scheme, with feedback on what you missed.
Sign up free →