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Nandi District Bio Ppr 3 Question Paper

Nandi District Bio Ppr 3

Course:Secondary Level

Exam Year:2006

231/2
1. You are provided with specimens R and S. Carefully study the specimens and answer
the questions that follow.
a) Name the phylum and class to which the specimens belong and give a reason for each case.
Phylum ……………………………………………………………………………1mk*NDI*
Reason …………………………………………………………………………… 1mk*NDI*
Class ……………………………………………………………………………… 1mk*NDI*
Reason …………………………………………………………………………… 1mk*NDI*
State three differences between specimens R and S. 3mks*NDI*
b) Carefully remove one of the inner wings from specimen R and trace the outline on
the graph paper
(i) Calculate the surface area of the wing. 2mks*NDI*
(ii) What is the significance of your answer in c(i) above to the organism. 1mk*NDI*
c) How is specimen S adapted to live in its habitat 2mks*NDI*
d) (i) Name the type of skeleton found in specimens R and S. 1mk*NDI*
(ii) State the importance of the type of skeleton mentioned, in e(i) above to the organisms.
1mk *NDI*
2. You are provided with specimen J. Remove the testa of each of them and crush the cotyledons using pestle and mortar. Add 15ml of distilled water to make a suspension. Using the reagents provided, test for the food substances in the suspension. Record the food tested, procedure, observations and conclusion in the table below. 12mks*NDI*
Food substance Procedure Observation Conclusion
3. You are provided with specimen K.. Carefully study the specimen and use it to answer the questions that follow.
a) (i)What part of a plant is it? 1mk*NDI*
(ii) Give two reasons for your answer in (a i) above. 2mks*NDI*
b) (i)Split the specimen into two halves , draw and fully label one half of the specimen 4mks*NDI*
(ii) State the magnification of your drawing. 1mk*NDI*
c) State the type of placentation in the specimen. 1mk*NDI*
d) With reasons state the method of dispersal of specimen (K)
Method 1mk*NDI*
Reasons 2mks*NDI*
e) What is the significance of seed and fruit dispersal in plants 2mks*NDI*

Nandi District Bio Ppr 3 Question Paper

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