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KCSE CLUSTER TESTS 26

Biology Paper 3

1.

Below are photographs of specimens obtained from plants. Examine the photographs

a).For each of the specimens, name the mode of pollination and the features that adapt the specimen to the mode of pollination.

Specimen R

-Mode of pollination (1mrk)
_______________________________________________________________________________
_______________________________________________________________________________
__________

-Adaptive features (2mrks)

i)______________________________________________________________________________
_______________________________________________________________________________
__________

ii)_____________________________________________________________________________
_______________________________________________________________________________
_________
Specimen S1

-Mode of pollination (1mrk)
_____________________________________________________________________________________
_____________________________________________________________________________________
__________

-Adaptive features (2mrks)

i)_____________________

13 marks

2.

The photographs labeled R, S, T and V are of bones obtained from a mammal. Examine them.

a). Identify the bones and name the part of the mammalian body from which each bone was obtained.

b).i). Name the joint formed between bones S and T at point marked X. (1mrk) ____________________________________________________________________________ ____________________________________________________________________________

________

ii) Give the characteristics of the joint named in (b) (i) above. (1mrk) ____________________________________________________________________________ ____________________________________________________________________________

________

c). i).Name the bone structure labeled Y. (1mrk)

____________________________________________________________________________ ____________________________________________________________________________

________

ii). State one function of the bone structure named in C (i) above. (1mrk) ____________________________________________________________________________ ____________________________________________________________________________

________

d).i). Using observable features give two adaptations of the bone labeled R. (2mrks)
_____________________________________________________________________________________
_____________________________________________________________________________________
_____________________________________________________________________________________

ii). On the bone in photograph V, draw a diagram of bone R to show the articulation between the two bones. (2mrks)
_____________________________________________________________________________________
_____________________________________________________________________________________
_____________________________________________________________________________________
_____________________________________________________________________________________

____________________

e). Name the part labeled Z in the photograph 5 and state its function. (2mrks) PartZ__________________________________________________________________________
_______________________________________________________________________________

__________

Function_______________________________________________________________________
_______________________________________________________________________________
__________

f). Name the joint formed by bone T with adjacent bones at its distal end. (1mrk)
_____________________________________________________________________________________
_____________________________________________________________________________________

__________

15 marks

3.

a). You are provided with a sample of food labeled P in solution form. Using the reagents provided, carry out tests on the food sample to identify the type of food substances present. (6mrks)

b). Suggest the regions of the human digestive system where the foods tested are digested. (2mrks)
_____________________________________________________________________________________
_____________________________________________________________________________________
_____________________________________________________________________________________
_____________________________________________________________________________________

____________________

c).State enzyme involved in the digestion of the foods tested. (2mrks)
_____________________________________________________________________________________
_____________________________________________________________________________________
_____________________________________________________________________________________

_______________

d). Name the deficiency diseases of each of the food tested. (2mrks)
_____________________________________________________________________________________
_____________________________________________________________________________________

12 marks

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