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231/3 BIOLOGY PAPER 3 PRACTICAL TIME: 13/4HRS

2020 FORM 4 TERM 1 ENTRY EXAMS KENYA CERTIFICATE OF SECONDARY EDUCATION

1. You are provided with specimen labeled F. Examine the specimen.

a) With reasons state the type of fruit specimen F is. (1mk)

Reason (1mk)

b) Carefully open specimen F to expose it’s contents

i) State the type of placentation in the specimen. (1mk)

ii) Draw and label the opened specimen. (5mks)

iii) Work out your magnification. (2mks)

c) Remove the seeds and crush them using a mortar and pestle to make a paste. Add alittle water to make about 10ml solution of the paste. Using the reagents provided test for the food substances present in the juice. Record the food substances being tested, procedures, observation and conclusion in the table below. (6marks)

Identify the specimens in the photograph using the key and outline the steps followed to identify each specimen. (8mks)