Hot Biology WASSCE Questions gathered by Ghanaeducation.org for all WASSCE 2023 candidates, try them out before Friday. They are highly be examinable.
Hot Biology WASSCE Questions
Answer three questions in all: two questions from Section A and the compulsory question in Section B
Write your answers in ink in this booklet.
Large labelled diagrams should be used where they make an answer clearer. The names given for chosen species must be English or scientific and not vernacular
Credit will be given for clarity of expression and orderly presentation of answers.
SECTION A
1. Answer two questions only from this section
(a) (iName three Classes of vertebrates that carry out double circulation.
(ii) What would be the effect on humans if they were to carry out single circulation?
[3 marks]
(b) Explain briefly how the following fruits are dispersed: (1) Tridax:
[2 marks]
(ii) Mango.
[3 marks]
(c) State three ways by which turgidity is of importance to plants.
[3 marks]
[3 marks]
(d) Name one chemical substance in the laboratory that could be used to convert sucrose to glucose and fructose.
[1 mark]
2. (a) State three conditions necessary for saliva to change starch to maltose.
[3 marks]
(b) State two functions of bile in digestion
[2 marks]
(c) What is the biological term for the partly digested food that passes from the stomach to the small intestine?
[1 mark]
3. (a) Explain briefly how the environment influences variation in a population.
[3 marks]
(b) In a school, the weight (kg) of thirty-five students that are fourteen year old were measured
The results are presented below.
20
33
35
34
42
22
28
40
30
22
25
24
32
20
27
29
26
40
23
38
20
31
21
35
37
24
39
43
29
22
33
41
30
31
38
(1) Complete the frequency distribution on the table below
.
Weight (class interval) number of students
20-24
25-29
30-34
35-39
40-44
[5 marks]
(ii) Using a scale of 2 cm to 2 units on the vertical axis and 2 cm to each class interval on the horizontal axis, draw a histogram for the frequency distribution in 3(b)(i) on the graph sheet provided.
[10 marks]
(iii) What is the number of students in the class interval with the highest weight?
(iv) What type of variation is shown?
[1 mark]
4. In an experiment, pure breeding pea plants with round seeds (R) were crossed with pure breeding pea plants with wrinkled seeds (r). All the seeds obtained in the first filial generation were round..
[1 mark]
(a) With the aid of a genetic diagram, show the results of the experiment
(b) If the F, plants are selfed, using a genetic diagram, determine the possible:
[8 marks]
(i) genotypes of the F, seeds; (ii) phenotypes of the F, seeds.
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(c) total of 856 seeds were collected in the F, generation. Calculate the number of seeds that would be:
[8 marks]
(i) round;