Question 1
LIST OF SPECIMENS
Specimen A - twig of mango plant.
Specimen B - twig of Ixora plant.
Specimen C - leaf of Hibiscus plant.
Specimen D - hibiscus flower.
Specimen E - green leafy vegetable.
Specimen F - a piece of freshly cut beef.
Specimen G - worker bee (wet preserved).
Specimen H - soldier termite (wet preserved).
Specimen K - adult cockroach (wet preserved).
Specimen L - nymph of cockroach (wet preserved).
Specimen M - young toad (freshly preserved).
Specimen N - scale of bony fish.
Specimen P - freshly preserved mammalian skin preferably of goat or ram with hair/fur measuring at least 4 cm by 4 cm placed in a petri dish.
Specimen S - a small amount of garden soil in a petri dish.
Specimen T - orange/lemon/lime/citrus fruit
Specimen V - tomato fruit.
Specimen W - cassava tuber.
Specimen Xi - stem of young cassava plant measuring at least 10cm in length.
Specimen Xii - stem of young cassava plant measuring at least 10cm in length as in Xi.
QUESTION 1
Study specimens Aand Bcarefully and use them to answer questions
1(a) to 1(e).
(a) Classify specimen B into its Division and Class. [2 marks]
(b) (i) State the types of leaf arrangements in specimens A and B. [2 marks]
(ii) Name the leaf shape of specimens A and B. [2 marks]
(c) (i) State the type of leaf margin in specimen A. [1 mark ]
(ii) State the types of venation found in the leaves of specimens A and B. [2 marks ]
(d) (i) List three observable similarities found in specimens A and B. [3 marks ]
(ii) In a tabular form, state four observable differences between specimens A and B. [4 marks]
Observation
Most candidates could not classify specimen B/twig of Ixora plant into its Division and Class and many that tried could not spell correctly. Most candidates could not answer questions (b) (i) and (ii); (c) (i) and (ii) correctly.
Many candidates could state observable similarities in specimens A and B quite well.
Only a few of the candidates’ drawings were good in question 1(e). Many candidates drew without putting the title of the diagram, the magnification and labelled correctly.
The expected answers are:
Angiospermatophyta/Angiospermophyta/Magniliophyta
(ii) Class
Dicotyledoneae/Magniliopsida
(b) (i) Types of leaf arrangements
Specimen A - Alternate/Spiral
Specimen B - Decussate/Opposite
(ii) Leaf shape
Specimen A - Lanceolate/Sword-like
Specimen B - Oval/Ovate
(c) (i) Type of leaf margin of specimen A
Entire/Smooth/Wavy
(ii) Types of venation found in Specimens A and B
Specimen A - Net/reticulate Specimen B - Net/reticulate
(d) (i) Observable similarities between Specimens A and B
(ii) Observable differences between Specimens A and B
Specimen A (mango) |
Specimen B (Ixora) |
|
Petiole/leaf stalk is short; |
|
Leaves have short apex/acute; |
|
Leaves have a broad lamina/leaf blade; |
|
Decussate/ opposite leaf arrangement; |
|
Leaves are smaller; |
Penalty: minus (-) 1 mark for no tabulation.
(e) Drawing/Diagram of leaf of specimen A
TL- Title
Quality
NL- Neat Labels
CL- Clarity of Lines
Sz- Size (8-10cm)
Mg- Magnification (x0.2 – x0.5)/ (x1/5 – x½)
Details
TA= Tapering Apex
NV=Net venation shown
MT= Midrib tapering to Apex
LS= Lanceolate Shape
Labels