TEST OF PRACTICAL KNOWLEDGE QUESTION Study specimens T, V and W carefully and use them to answer questions 4(a) to 4(d) (a) Classify Specimen T,V and W acco...
Study specimens T, V and W carefully and use them to answer questions 4(a) to 4(d)
(a) Classify Specimen T,V and W according to the following criteria: (i) Agricultural classification: (ii) Life cycle.
(b) State two ways in which specimen W is important to human nutrition.
(c) With a scalpel or knife, make a cross Section of specimen T.
(ii) What type of placentation is observed in the cut section of specimen T? Name one example of a fruit with similar placentation as observed in the cut section of specimen T.
Make a drawing 10 cm - 12 cm long of the transverse section and label fully.
(d) Make a transverse section of Specimen V and state: (i) Three Observable differences;
(ii) Three observable similarities; between the transverse section of specimen T and V.
Study specimen Xi and Xii and use them to answer question 4 (e) (i) to 4 (e) (ii)
(e) Carefully remove the bark of specimen Xi to expose the naked part.
(i) State two observable differences between Specimen Xi and Xii.
(ii) If Xi and Xii are planted, what difference will be noticed after a month? State one reason for the answer in 4 (e)(ii)
4(a) Classification of specimens
Criterion
Specimen T
Specimen V
Specimen W
Agricultural classification
Fruit crop
Vegetable crop
Root-tuber crop
Life cycle
Perennial
Annual
Biennial
4(b) Importance of specimen W to human nutrition
It is a source of starch/carbohydrate and therefore supplies energy.
It provides dietary fibre and vitamins which promote healthy digestion and general body health.
4(c) Transverse section of specimen T
The placentation is axile placentation. A fruit with similar placentation is tomato, pepper or garden egg.
Labelled drawing of the transverse section of orange/citrus fruit:
Labelled transverse section of a citrus fruit showing axile placentation.
4(d) Comparison of transverse sections of T and V
(i) Observable differences
Specimen T, orange/citrus
Specimen V, tomato
Has few or no seeds; seeds, where present, are relatively larger.
Has many relatively smaller seeds.
Epicarp and mesocarp form a thick, firm or leathery rind.
Epicarp and mesocarp are soft and juicy.
Endocarp consists of distinct juicy segments containing succulent hairs.
Endocarp is a uniform juicy pulp.
(ii) Observable similarities
Both contain seeds.
Both have fused epicarp and mesocarp.
Both have succulent endocarp/pulp.
Both show axile placentation.
4(e)
(i) Observable differences between Xi and Xii
Xi
Xii
Node is absent.
Node is present.
Scale leaf/bark is absent, exposing whitish wood.
Scale leaf/bark is present and the stem is brown or green.
No axillary bud is present.
An axillary bud is present.
(ii) Result after planting
Xii will germinate and produce a shoot, whereas Xi will not germinate and may decay. This is because Xii possesses an axillary bud which develops into a new shoot, while the bud was removed from Xi.
It is a source of starch/carbohydrate and therefore supplies energy.
It provides dietary fibre and vitamins which promote healthy digestion and general body health.
4(c) Transverse section of specimen T
The placentation is axile placentation. A fruit with similar placentation is tomato, pepper or garden egg.
Labelled drawing of the transverse section of orange/citrus fruit:
Labelled transverse section of a citrus fruit showing axile placentation.
4(d) Comparison of transverse sections of T and V
(i) Observable differences
Specimen T, orange/citrus
Specimen V, tomato
Has few or no seeds; seeds, where present, are relatively larger.
Has many relatively smaller seeds.
Epicarp and mesocarp form a thick, firm or leathery rind.
Epicarp and mesocarp are soft and juicy.
Endocarp consists of distinct juicy segments containing succulent hairs.
Endocarp is a uniform juicy pulp.
(ii) Observable similarities
Both contain seeds.
Both have fused epicarp and mesocarp.
Both have succulent endocarp/pulp.
Both show axile placentation.
4(e)
(i) Observable differences between Xi and Xii
Xi
Xii
Node is absent.
Node is present.
Scale leaf/bark is absent, exposing whitish wood.
Scale leaf/bark is present and the stem is brown or green.
No axillary bud is present.
An axillary bud is present.
(ii) Result after planting
Xii will germinate and produce a shoot, whereas Xi will not germinate and may decay. This is because Xii possesses an axillary bud which develops into a new shoot, while the bud was removed from Xi.
