CARA'S TIPSPractical 1: the paper, observation, drawing rules, magnification and the microscope
WAECNECO
What the syllabus asks
WAEC: format, observation, biological drawing, magnification, microscope, temporary slides, classification of specimens, safety and exam technique. Underpins bp2–bp6.
NECO: format, observation, biological drawing, magnification, microscope, temporary slides, classification of specimens, safety and exam technique. Underpins bp2–bp6.
What you will learn
- Describe the format of WAEC Paper 3 and NECO Paper I in Biology.
- Make observations of specimens systematically.
- Produce a biological drawing that follows every examiner rule.
- Calculate magnification correctly.
- Name the parts of the light microscope and use it correctly.
- Prepare a temporary slide.
- Classify common specimens.
- Write adaptation, habitat and economic-importance answers that score.
Key points
- Paper 3 (WAEC): 2 h, 80 marks; 25 + 25 + 30 for Nigerian candidates.
- NECO calls it Paper I (practical), 2 h.
- Observe systematically: size, colour, divisions, appendages, surface, special structures.
- Drawing rules: big, pencil, clean, no shading, labels, ruled guide lines, title, ×M.
- M = drawing ÷ actual, same units, no unit.
- Microscope: eyepiece × objective; fine focus on high power.
- Adaptation = feature + function; differences compare the same feature.
Start here: The biology practical paper: what you will face
Every WASSCE and NECO SSCE biology candidate sits a practical paper, and it carries a large share of the subject marks. WAEC Biology Paper 3 is a practical test for school candidates (a “test of practical work” for private candidates). It lasts 2 hours and carries 80 marks. It has Section A, two compulsory questions of 25 marks each, and a third question of 30 marks. Candidates in Ghana answer that third question from Section B; candidates in Nigeria, Sierra Leone, The Gambia and Liberia answer it from Section C. So a Nigerian candidate answers three questions: two from Section A and one from Section C.
NECO numbers its papers differently. Its practical is Biology Paper I: Practical (paper code 2011). In the 2026 SSCE timetable it lasts 2 hours. Its objective and essay papers are Papers III and II, which are taken together. NECO does not publish a detailed scheme like WAEC’s, but its questions follow the same national curriculum and use the same style: specimens labelled A, B, C… with questions on identification, classification, features, adaptations, drawing and simple experiments. The NECO timetable also states that candidates who do not sit the practical (Paper I) will not have a result in the subject, so the practical is not optional.
What the questions look like
A typical WAEC question begins: “Study specimens A, B, C and D and answer questions 1(a) to 1(f).” You may be asked to state observable differences between two specimens, put ticks in a table, name the phylum or class of each, state a function, cut a specimen open and record what you see, state the habitat, and make a drawing. In the 2023 WAEC paper, for example, candidates compared catfish eggs with a fowl’s egg, classified them, opened the fowl’s egg and named its parts. Every one of those tasks rests on careful observation of the specimen on the bench.
The specimen list
Before the examination, WAEC and NECO send schools a confidential list of specimens to prepare (for example “Specimen F: Guinea grass, whole plant”). Your teacher may tell you the group names but not the questions. Use the list to revise: for each specimen know its name, classification, habitat, observable features, adaptations, economic importance and how to draw it. This unit and units bp2–bp6 give you exactly that for the specimens that come up again and again.
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Practice questions
- drawing length ÷ actual length
- actual ÷ drawing
- drawing × actual
- drawing − actual
Show answer
A: drawing length ÷ actual length
No units.
- × 8
- × 0.33
- × 48
- × 3
Show answer
D: × 3
12 ÷ 4.
- coloured pencils
- a marker
- a sharp pencil
- a pen
Show answer
C: a sharp pencil
Clear single lines.
- used for the outline
- avoided
- required
- used for all parts
Show answer
B: avoided
Use labels instead.
- ruled and not crossing
- curved
- arrows crossing
- drawn in ink
Show answer
A: ruled and not crossing
Touch the part named.
Key words
- Specimen
- A real organism, part or model provided for study, labelled with a letter.
- Observable feature
- A feature that can be seen, felt or measured on the specimen.
- Magnification
- Ratio of drawing (or image) size to actual size; no unit.
- Guide line
- A ruled line from a label to the part, with no arrow-head.
- Longitudinal section (L.S.)
- A cut along the long axis.
- Transverse section (T.S.)
- A cut across the long axis.
- Hand lens
- A convex lens used to magnify small details, typically ×5 to ×10.
- Temporary slide
- A specimen mounted in water or stain under a cover slip for immediate viewing.
- Adaptation
- A feature that helps an organism survive in its habitat.
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