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Narok District Bio Ppr 3 Question Paper

Narok District Bio Ppr 3

Course:Secondary Level

Exam Year:2006

231/3
1. You are provided with specimen D 1 and D2 which are organs of two different plants. Examine them carefully and answer the questions that follow.
a) Name the type of fruit of each specimen
(i) Type of fruit D1 (1mk) *Nrk*
(ii) Type of fruit D2 (1mk) *Nrk*
b) Draw and label the unopened fruit D2. (3mks) *Nrk*
c) Carefully open specimen D2 and remove one seed. State two differences and two similarities between specimens D1 and D2.
Differences (2mks) *Nrk*
D 1 D2
(i)

(ii)

Similarities 2mks) *Nrk*
d) Classify D1 upto the division 2mks) *Nrk*
Kingdom
Division e) State the method of dispersal of specimen
D2 1mk*Nrk*
2. You are provided with a cut transverse section of specimen T through the middle
a) Make a labeled plan diagram of the exposed cut surface. (4mks) *Nrk*
b) From your observation, suggest the type of placentation of specimen T. (1mk) *Nrk*
Cut a 2cm slice from the specimen and remove its peel. Place the soft inner part in a mortar, and using a pestle mash it into a fine paste. Add a little of distilled water and stir the mixture. Pour the mixture into a beaker and allow it to stand for 2 minutes.
Using the reagents provided, test for the food substances in the mixture. Record procedure, observation and conclusion in the table below. (9mks) *Nrk*
Food Procedure Observation Conclusion

Starch

Vitamin C

Reducing sugar

3. You are provided with specimen K1 Examine it using a hand lens.
a) Draw and label specimen K1. (5mks) *Nrk*
Magnification 1mk*Nrk*
b) Give two pieces of evidence to show that the specimen is well adapted for locomotion in its habitat. (2mks) *Nrk*
c) State two features observed on the specimen to show that the specimen has capacity for irritability. 2mks) *Nrk*
c) Using a hand lens, examine specimen K2 which has been removed from specimen K1.
(i) State the function of K2. (1mk) *Nrk*
(ii) Name three characteristics that adapt specimen K2 to its function. (3mks) *Nrk*

Narok District Bio Ppr 3 Question Paper

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