Dissect specimen K (a frog or toad) to expose its digestive system.

1. Draw a diagram showing seven labelled parts of the digestive system. (10 mk)
2. State two precautions you must take when opening the inner body skin of specimen K. (5 mk)
3. Give three major differences between digestive systems of amphibians and insects. (15 mk)

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You are given solution X.

1. Using the provided reagents, conduct food tests and complete the table below: Food Tested | Procedure | Observation | Inference (5 mk)
2. Mention two roles of each food substance found in solution X in human nutrition. (3 mk)
3. Why is heat important during Benedict’s test? (2 mk)

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Observe specimens D, F, and G.

1. (i) Give two observable features that classify specimen D into its kingdom. (ii) How is specimen D adapted to arid conditions? Give three ways. (5 mk)
2. (i) From which organism was specimen G taken? (ii) State two functions of specimen G. (3 mk)
3. State three features that classify specimen F into its class. (2 mk)

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