Q15 of 59 Page 1

"Two areas of study namely 'evolution' and 'classification' are interlinked". Justify this statement.

Classification of organisms is based on relative similarities and differences in their internal and external structures. Similarities among organisms will allow us to group them and study the groups and classify them. Some basic characteristics will be shared by, most organisms. The more characteristics the two species will have in common, the more closely they are related. The more closely they are related, the more recently they have had a common. Ancestor so we can say that classification of a species is in fad a reflection of their evolutionary relationship.


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13

(a) List two reasons for the appearance. Of variations among the progeny formed by sexual reproduction.

(b)


(i) Name the part marked 'A' is the diagram.


(ii) How does 'A' reach part 'B'?


(iii) State the importance of part 'C'.


(iv) What happens to the part marked 'D' after fertilization is over?

 14

How does Mendel's experiment show that traits are inherited independently?

 16

The image of an object formed by a mirror is real, inverted and is of magnification -1. H the image is at a distance of 40 cm from the mirror, where is the object placed? Where would the image be if the object is moved 20 cm towards the mirror? State reason and also draw ray diagram for the new position of the object to justify your answer.

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Describe an activity to show that the colours of white light splitted by a glass prism can be recombined to get white light by another identical glass prism. Also draw ray diagram to show the recombination of the spectrum of white light.