CIE iGCSE Co-Ordinated Science B6.2 Leaf structure Exam Style Questions Paper 3
Question
(a) Fig. 10.1 is a diagram of a cross-section through a leaf.
(i) State the name of the part labelled X and the cell labelled Y in Fig. 10.1.
part X ………………………………………………………………………………………………………………..
cell Y …………………………………………………………………………………………………………………
(ii) Draw one arrow on Fig. 10.1 to show the pathway of water vapour during transpiration.
(b) Fig. 10.2 is an incomplete sketch graph.
Complete Fig. 10.2 to show the effect of humidity on the rate of transpiration by:
• including axis labels
• drawing a line to show the trend.
(c) State the name of the type of plant cell that absorbs water from the soil.
……………………………………………………………………………………………………………………………
(d) State the name of the plant tissue that transports water from the roots to the leaves.
……………………………………………………………………………………………………………………………
(e) Suggest one reason why not all the water absorbed is lost through transpiration.
…………………………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………………
(f) Blood has several functions including transport in humans.
(i) State one function of white blood cells.
…………………………………………………………………………………………………………………….
(ii) State two other main components of blood.
1 ……………………………………………………………………………………………………………………….
2 ……………………………………………………………………………………………………………………….
▶️Answer/Explanation
Ans: 10(a)(i) X – (upper) epidermis ;
Y – spongy mesophyll ;
10(a)(ii) arrow drawn from leaf going out of stoma ;
10(b) axis labels ;
negative correlation ;
10(c) root hair (cell) ;
10(d) xylem ;
10(e) some used in, photosynthesis / support ;
10(f)(i) phagocytosis / production of antibodies ;
10(f)(ii) any two from:
red blood cells ;
plasma ;
platelets ;
Question
(a) Fig. 7.1 is a drawing of a cross-section of a leaf.
State the names of the parts labelled A, B and C in Fig. 7.1.
A …………………………………………………………………………
B …………………………………………………………………………
C …………………………………………………………………………
(b) Fig. 7.2 is a cell from the palisade mesophyll layer of the leaf.
On Fig. 7.2:
• Identify the part where photosynthesis takes place with a label line and the correct name.
• Identify the part that contains the genetic material with a label line and the letter X.
(c) Describe the process of photosynthesis.
(d) Plants need nitrate ions to make an important substance.
Circle the name of this substance.
amino acid fatty acid starch
glycogen glycerol
(e) State the name of the cell that absorbs mineral ions in a plant.
(f) State the name of the vessels that transport mineral ions in the stem.
▶️Answer/Explanation
Ans : 7(a) A – cuticle ;
B – (lower) epidermis ;
C – stoma / stomata ;
7(b) one chloroplast with label line ;
with correct name ;
nucleus labelled with an X ;
7(c) (process used in plants / producers) to manufacture glucose ;
from raw materials / carbon dioxide and water ;
using light energy ;
7(d) amino acids circled ;
7(e) root hair (cell) ;
7(f) xylem ;