You have been provided with specimens O and M, the chemical reagents and apparati. You are required to identify the food substances present in the specimens. (a) Prepare the solutions from specimen O and M for the food test experiments, then, outline the procedures used to prepare each solution. (b) Carry out experiments to identify the food substances present in specimens O and M, as shown in the following Table: Table: Identification of Food Substances in Specimens O and M | Food Tested | Procedure | Observation | Inference | (c) State the function(s) of each food substance identified in 1(b) to the human body. (d) Apart from the specimen provided, give another one example of natural source from which the food substances identified in 1(b) could be obtained.

1. Prepare the solutions from specimen O and M for the food test experiments, then, outline the procedures used to prepare each solution. (5 mk)
2. Carry out experiments to identify the food substances present in specimens O and M, as shown in the following Table: Table: Identification of Food Substances in Specimens O and M | Food Tested | Procedure | Observation | Inference | (10 mk)
3. State the function(s) of each food substance identified in 1(b) to the human body. (5 mk)
4. Apart from the specimen provided, give another one example of natural source from which the food substances identified in 1(b) could be obtained. (5 mk)

Upgrade to see model answers.

You have been provided with specimens E, F and G obtained from different habitat. Carefully study them and answer the following questions: (a) Identify the Phylum/Division and the Kingdom in which each specimen E, F and G belongs. (b) For each of specimens E, F and G state three observable features which are characteristic of its respective Phylum/Division. (c) Name the habitat of each of specimens E, F and G. (d) For each of specimens E, F and G state whether it is a producer, consumer or decomposer in its natural habitat. Give reason for each case. (e) State two advantages and one disadvantage of specimen E to other living organisms.

1. Identify the Phylum/Division and the Kingdom in which each specimen E, F and G belongs. (6 mk)
2. For each of specimens E, F and G state three observable features which are characteristic of its respective Phylum/Division. (9 mk)
3. Name the habitat of each of specimens E, F and G. (3 mk)
4. For each of specimens E, F and G state whether it is a producer, consumer or decomposer in its natural habitat. Give reason for each case. (4 mk)
5. State two advantages and one disadvantage of specimen E to other living organisms. (3 mk)

Upgrade to see model answers.