KNEC KCSE Biology Paper 3 – 2014 Nakuru District Mock

You are provided with a specimen labeled S
(a) Classify the specimen into the following taxa
(i) Division ………………………………………………………………………………(1 mark)
ii) Class…………………………………………………………………………………..(1 mark)
iii) Using observable features give a reason to your answer in a(ii) above (1 mark) ……………………………………………………………………………………………………
……………………………………………………………………………………………………
(b) Separate the aerial leaves and roots from the bulb. Using a pestle and mortar, crush the
aerial leaves, bulb and roots separately.
To each crushed material add 1 ml of distilled water. Put the extract from the materials into
separate test tubes and label them. Using the reagents provided, test for the food substances
in each of the extracts. Record the procedure, observation and conclusions in t he table
below.

(c) Account for the results obtained in (b) above
(i) Aerial leaves (2 marks)

……………………………………………………………………………………………………
……………………………………………………………………………………………………
……………………………………………………………………………………………………
(ii) Bulb (2 marks)

……………………………………………………………………………………………………
……………………………………………………………………………………………………
……………………………………………………………………………………………………
(iii) Roots (2 marks)

……………………………………………………………………………………………………
……………………………………………………………………………………………………
………………………………………………………………………………………………….

Study the photographs P, Q and S and use them to answer the questions that follow.

(a) Photographs P and Q are teeth of animals in an ecosystem. Which tooth represents the
animal that depends on the other for food?
………………………………………………………………………………………. (1mark)
(b) Identify tooth Q…………………………………………………………………. ……… (1 mark)
(c) State one functional difference between tooth P and Q. (1 mark) ……………………………………………………………………………………………………
(d)(i) Name the labeled parts F and A in photograph S (2 marks)
F: …………………………………..

A: …………………………………………….
(ii) Name one common disease that affects part D…………………………….. (1 mark)
(e) Identify the type of dentition shown in photograph S (1 mark) …………………………………………………………………………………………………
Reason

…………………………………………………………………………………………..
(f) Write the dental formula from photograph S above (2 marks) ……………………………………………………………………………………………………
……………………………………………………………………………………………………
……………………………………………………………………………………………………

The photographs A and B below represent part of urino-genital system in rabbits.

Study them to answer the questions that follow
(a) Using photograph B;
(i) Name the parts labeled (3 marks)
F……………………………………………………..

C…………………………………………………

I………………………………………………………
(ii) Name and state the functions of the parts labeled B and G (4 marks)
B………………………………………………………………………………………
Function ………………………………………………………………………………..
G…………………………………………………………………………………………………….

Function ………………………………………………………………………………..
(iii) Name the fluid found in part labeled D…………………………………………… (1 mark)
(b) Study photograph A carefully.
(i) Name part Z……………………………………………………………………… (1 mark)
(ii) Differentiate between the contents in the structure X (Renal artery) and Y (Renal vein)
(2 marks)

……………………………………………………………………………………………………
……………………………………………………………………………………………………
……………………………………………………………………………………………………
(c) Which part s of the nephron are found in the region labeled W (2marks) ………………………………………………………………………………………………..