Instructions to Candidates
- Answer ALL the questions in the spaces provided below each question in the question paper.
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- Solution A and B are mammalian excretory products. They are similar except they were obtained from two different animals ;A and B of the same species. This is the main nitrogenous waste in mammals
Use the two samples A and B to carry out the following experiment and hence record your findings.
Using the reagents provided,Carry out the appropriate food tests on sample A and B and hence complete the table below. (6mks)
TEST PROCEDURE SAMPLE A SAMPLE B OBSERVATION CONCLUSION OBSERVATION CONCLUSION Glucose Protein - With reference to the results suggest the animal that is unhealthy. (1mk)
- For the unhealthy (sick) animal identified in (b) above, name the disease its suffering from. (1mk)
- Explain the cause of the disease identified in (c) above. (2mk)
- State how the disease in (c) above can be treated. (1mk)
- Other than excretory wastes in A and B, name any other nitrogenous excretory wastes in animals and give an example of an animal that excretes it. (2mks)
- Solution A and B are mammalian excretory products. They are similar except they were obtained from two different animals ;A and B of the same species. This is the main nitrogenous waste in mammals
- Observe the photographs below and answer the questions that follow.
- Name the feeding relationship illustrated in Photograph:
- T…………………………………………………………………………… (1MK)
- Y……………………………………………………………………………. (1mk)
- With reasons identify the phylum and the kingdom to which organism S belongs
Kingdom Phylum Classification Reason - State two observable roles of organism P to an ecosystem in photograph T (2MK)
- State the significance of the behavior pattern illustrated by
- Organism in photograph U (IMK)
- Organism in photograph Z (1mk)
- Organism S and organism Z initially belonged to the same species but with time they have speciated to two distint species. Explain the mechanism that has led to their speciation (2mks)
- Explain why we can only have a limited number of tropic levels in a natural ecosystem (1mk)
- Name the feeding relationship illustrated in Photograph:
- Below are photographs of mammalian bones J, R, A and B from the same animal.
- With reasons identify the following bones. (4mk)
BONE REASON J R - Onto which of the labelled parts on J does structure 1 and 2 on bone R articulate. (2mk)
- 1 articulates with. ……………………………………….
- 2 articulates with. ……………………………………….
- Make a drawing to show how bones J and bone R articulate (3mk)
- Name the bone that articulates with Bone A at the proximal and name the type of joint formed. (2mks)
- Name the region from which bone B was obtained. (1mk)
- State two ways in which bone B is structurally adapted to perform its functions. (2mk)
- With reasons identify the following bones. (4mk)
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Download Biology Paper 3 Questions - Mokasa II Joint Mock Exams 2023.
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