Biology · Paper 2A · 2001
3 questions 🇹🇿 NECTA ✓ MS3-hour timed simulation · auto-graded · counts toward ranking
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Section A
Dissect the provided specimen J in the usual way to expose the reproductive system. Then respond to the following: (a) Draw a well labelled diagram of the dissected specimen J showing four parts of the reproductive system. (b) Identify the organ responsible for the following functions: (i) Production of sperm or egg (ii) Temporary storage of gametes (iii) Transportation of gametes (c) What would happen if the anterior abdominal vein is accidentally punctured during dissection? (d) State two reasons why water is poured into the body cavity during the dissection.
- Draw a well labelled diagram of the dissected specimen J showing four parts of the reproductive system. (10 mk)
- Identify the organ responsible for the following functions: (i) Production of sperm or egg (ii) Temporary storage of gametes (iii) Transportation of gametes (9 mk)
- What would happen if the anterior abdominal vein is accidentally punctured during dissection? (4 mk)
- State two reasons why water is poured into the body cavity during the dissection. (7 mk)
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You are provided with solution K. Perform the following biochemical tests: (a) Using the given reagents, test the solution for food substances and record your results in the table: Food Tested Procedure Observation Inference (b) Mention two natural food sources from which solution K could have been extracted. (c) State the first site of digestion, digestive juice, and end product of the identified food substance in solution K.
- Using the given reagents, test the solution for food substances and record your results in the table: (6 mk)
- Mention two natural food sources from which solution K could have been extracted. (2 mk)
- State the first site of digestion, digestive juice, and end product of the identified food substance in solution K. (2 mk)
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Observe specimens W , X , Y, Z, and AA. Answer the following: (a) Mention four observable differences between specimen W and X. (b) Mention four observable differences between specimens Z and AA. (c) Draw specimen Z and label four visible structures.
- Mention four observable differences between specimen W and X. (4 mk)
- Mention four observable differences between specimens Z and AA. (4 mk)
- Draw specimen Z and label four visible structures. (2 mk)
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