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Biology
WAEC / WASSCE 1989
Variation & Genetics (Heredity)
Solution
(a) (i) State one function of plastids to plants (i) Name one plastid found in plants (b) State one function each of (i) mitochondrion (ii) chromosome
medium Difficulty
Verified Correct Answer: Option
Biological Concept & Syllabus Guide
(a) it is used for photosynthesis (also for storage) (ii) Chloroplast (others are leucoplasts and chromoplast) (b) (i) Cellular respiration takes place here (power house DNA (Deoxyribonucleic acid) which stores genetic characters
Source: Myschool Past Questions Archive (Record #59796)
Biology
WAEC / WASSCE 1989
Transport System in Plants & Animals
Solution
(a) Name the vessel that carries blood from the wall of the small intestine to the liver (b) State two similarities in structure between the transport systems in plants and animals.
medium Difficulty
Verified Correct Answer: Option
Biological Concept & Syllabus Guide
(a) Hepatic portal vein (b) (i) They all carry materials in well-defined vessels that constitute the vascular system. The materials that are transported are in liquid form in both plants and animals.
Source: Myschool Past Questions Archive (Record #59797)
Biology
WAEC / WASSCE 1989
Cell Structure, Organization & Cell Division
Solution
List (a) two plant characteristics (b) two animal characteristics found in Euglena.
medium Difficulty
Verified Correct Answer: Option
Biological Concept & Syllabus Guide
(a) (i) Possession of chloroplasts (i) Possession of cell walls. Others are presence of large vacuoles, rigid cells, paramylum granules e.t.c
(b)(i) Eyespot (ii) Gullet
Source: Myschool Past Questions Archive (Record #59798)
Biology
WAEC / WASSCE 1989
Nutrition in Plants & Animals (Photosynthesis & Food Substances)
Solution
Specimen G is a paste made from a food material. Carry out the following tests to identify the food substances contained in specimen G. Wash the test tube after each use to ensure that the next sample is not contaminated. All tests and observations should be recorded in a table as shown below.
Test
observation
inference
(a) (i) Pour 5 cm/(^3/) of specimen G into a test tube and add three drops of sodium hydroxide solution. Shake two test tube. Record your observation. Then add three drops of copper (ii) tetraoxosulphate (VI) solution (CuSO/(_4/)). Shake the test tube. Record your observations and inference (b) Pour 5 cm/(^3/) of specimen G into a test tube and three drops of Sudan IIl. Shake the mixture. Record your observation and inference (d) To another 5 cm/(^3/) of specimen G add four drops of Fehling's solution. Shake the test tube. Warm the mixture. Record your observation and inference
medium Difficulty
Verified Correct Answer: Option
Biological Concept & Syllabus Guide
Test
observation
inference
(a) 5cm of specimen G +3 drops of NaOH solution + 3 drops of CuSO,
White or creamy suspension, purple or violet colour was was observed
Protein present
b) 5cm of specimen G + 3 drops Oil present of Sudan Ill and shaken
Red colour was obseved.
Oil present
(c) 5cm of specimen G + 3 drops
Blue-black or black colour was observed
(d) 5cm of specimen G +3 drops and warmed in the flame
No colour change or blue colour observed, reddish brown pink or red colour observed
Reducing sugar is absent. Reducing sugar is present of fehling's solution, shaken
Source: Myschool Past Questions Archive (Record #59804)
Biology
WAEC / WASSCE 1989
Nutrition in Plants & Animals (Photosynthesis & Food Substances)
Diagram
Solution
The diagram above illustrates a leaf before and after an experiment stated below. The leaf shown in diagram I was detached from a potted plant which had been exposed to sunlight for 4-5 hours while diagram ll shows the same leaf after the test for starch.
(7) (a) Name the type of leaf used for this experiment (b) Why is this type of leaf most suitable for the experiment? (c) State one precaution that should be taken in carrying out this experiment (d) What would be the colours of the parts labelled X and Y after the test for starch? (e) Suggest the aim of this experiment.
Attached Figure / Diagram
medium Difficulty
Verified Correct Answer: Option
Biological Concept & Syllabus Guide
7. (a) Variegated leaf (b) This is because chlorophyll is only present in the green patches, and not in other patches that have white, yellow or pink colours (c) The leaves must be exposed to sunlight for photosynthesis to take place (d) (i) x will only retain the brown colour of iodine (i) y will be blue-black in colour (e) Aim: To show that chlorophyll is essential for photosynthesis.
Source: Myschool Past Questions Archive (Record #59799)
Biology
WAEC / WASSCE 1989
Growth, Micro-organisms & Public Health
Solution
List íour crop diseases.
medium Difficulty
Verified Correct Answer: Option
Biological Concept & Syllabus Guide
(i) Cassava mosaic disease (ii) Blast disease of rice (iii) Black pod disease of cocoa (iv) Others are bacterial tomato wilt, soft spot of carrot (bacterial), mycoplasma disease of plants (bacteria), swollen shoot of cocoa and potato blight.
Source: Myschool Past Questions Archive (Record #59800)
Biology
WAEC / WASSCE 1989
Growth, Micro-organisms & Public Health
Diagram
Solution
(a) Name the organism represented in the diagram above (b) Name the structure labelled x (c) Into what stage would the organism develop?
Attached Figure / Diagram
medium Difficulty
Verified Correct Answer: Option
Biological Concept & Syllabus Guide
(a) Culex mosquitoe's larva (b) Breathing (siphon) tube (c) Pupal stage. floss.
Source: Myschool Past Questions Archive (Record #59801)
Biology
WAEC / WASSCE 1989
Reproduction in Plants & Animals
Solution
You are provided with specimens A, B and C (a) identify specimens A, B and C without reason.
(b) Make a labelled drawing 6-8 cm long of the longitudinal section of specimen A to illustrate its essential features
(c) (i) Suggest the possible means of pollination of specimen A (ii) Give three reasons for your answer
(d) (i) Name one agent of dispersal each for specimen B and C (ii) Give one reason each for your answer.
medium Difficulty
Verified Correct Answer: Option
Biological Concept & Syllabus Guide
10. (a) Specimen A is an insect-pollinated flower (flambuoyant - flower). SpecimenC is a Tridax fruit with pappus shoot of cocoa and potato blight (a) Culex mosquitoe's larva (b) Breathing (siphon) tube (c) Pupal stage. or in some schools, a cotton seed with lint or with floss.
(c) (i)Specimen A is pollinated by insects (ii) Three reasons for my answer are: (a) Specimen A is brightly coloured (b) Specimen A is scented (c) Specimen A has nectar or nectary (d) It also has mature and sticky stigma (d) (i) Specimen B is dispersed by animals, Specimen Cis dispersed by wind () Reasons for the dispersal of specimen B are: It is brightly coloured. It is also soft, fleshy (succulent) and edible. Specimen C is light enough. It has lint or floss. It has tuft of hairs or pappus to aid buoyance in the air
Source: Myschool Past Questions Archive (Record #59802)
Mathematics
WAEC / WASSCE 1988
Algebraic Expressions, Polynomials & Factorisation
Solution
Evaluate (101.5)2 - (100.5)2
A
1
B
2.02
C
20.02
D
202
E
2020
medium Difficulty
Verified Correct Answer: Option D
Step-by-Step Mathematical Solution
(101.5)2 - (100.5)2;(101.5 + 100.5)
202 x 1
= 202
Source: Myschool Past Questions Archive (Record #22007)
Mathematics
WAEC / WASSCE 1988
Fractions, Decimals, Percentages & Approximations
Solution
Express the product of 0.06 and 0.09 in standard form
A
5.4 * 10-1
B
5.4*10-2
C
5.4*10-3
D
5.4*102
E
5.4*103
medium Difficulty
Verified Correct Answer: Option C
Step-by-Step Mathematical Solution
0.06 x 0.09 = 0.0054
= 5.4 x 10-3
Source: Myschool Past Questions Archive (Record #22008)
Mathematics
WAEC / WASSCE 1988
Indices, Logarithms & Surds
Solution
Simplify 36\(^\frac{1}{2}\) x 64\(^{-\frac{1}{3}}\) x 5\(^0\)
A
0
B
1\24
C
2/3
D
11/2
E
71/2
medium Difficulty
Verified Correct Answer: Option D
Step-by-Step Mathematical Solution
36\(^\frac{1}{2}\) x 64\(^{-\frac{1}{3}}\) x 5\(^0\)
= \(6 \times \frac{1}{4} \times 1\)
= \(1\frac{1}{2}\)
Source: Myschool Past Questions Archive (Record #22012)
Mathematics
WAEC / WASSCE 1988
Sequences & Series (AP & GP)
Solution
Find the 8th term of the A.P -3, -1, 1 ......
A
13
B
11
C
-8
D
-11
E
-17
medium Difficulty
Verified Correct Answer: Option B
Step-by-Step Mathematical Solution
Un = a + (n-1)d
= -3 + (8 - 1)2
= 11
Source: Myschool Past Questions Archive (Record #22014)
Mathematics
WAEC / WASSCE 1988
Statistics (Data Representation, Central Tendency & Dispersion)
Diagram
Solution
A group of students took a test and the following frequency table shows the scores above
Find the mode
Attached Figure / Diagram
A
2
B
3
C
4
D
5
E
7
medium Difficulty
Verified Correct Answer: Option C
Step-by-Step Mathematical Solution
The mode=4. It has the highest frequency of 7
Source: Myschool Past Questions Archive (Record #22018)
Mathematics
WAEC / WASSCE 1988
Statistics (Data Representation, Central Tendency & Dispersion)
Diagram
Solution
A group of students took a test and the following frequency table shows the scores above
The mean score is
Attached Figure / Diagram
A
1.75
B
2
C
2.5
D
2.75
E
3
medium Difficulty
Verified Correct Answer: Option D
Step-by-Step Mathematical Solution
Score
0
1
2
3
4
5
Total
Freq
2
3
4
2
7
2
20
\(fx\)
0
3
8
6
28
10
55
\(\bar{x} = \frac{\sum fx}{\sum f}\)
= \(\frac{55}{20}\)
= \(2.75\)
Source: Myschool Past Questions Archive (Record #22020)
Mathematics
WAEC / WASSCE 1988
Statistics (Data Representation, Central Tendency & Dispersion)
Diagram
Solution
A group of students took a test and the following frequency table shows the scores above
The median score is
Attached Figure / Diagram
A
o
B
2.5
C
3
D
5
E
7
medium Difficulty
Verified Correct Answer: Option C
Step-by-Step Mathematical Solution
There are 20 students. Hence, the median is found by the average of the 10th and 11th score.
= \(\frac{3 + 3}{2}\)
= 3
Source: Myschool Past Questions Archive (Record #22021)