Provided 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

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- Adaptive features.

i)

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ii)

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Specimen S1

- Mode of pollination

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- Adaptive features

i)

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ii)

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b) Describe the arrangement of the stamens of the flower in photograph R.

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c) Name the structure labeled X on specimen S1.

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d) Using observable features, only state two differences between R and S. .................................................................................................................................................. ................................................................................................................................................... .................................................................................................................................................. ...................................................................................................................................................

e) With a reason, name the class of the spermatophyta to which specimen R belongs. Class..................................................................................................................................................

Reason

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a) You are provided with solution labelled A1 obtained by mixing substance A with warm water. Using the reagents provided, test for the food substance in the solution. Record your results in the table provided.

b)

i) What is substance A likely to be?

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ii) Where does digestion of A1 start in the human body?

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iii) State the enzyme responsible for the digestion of A1 in b (ii) above?

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iv) Name a deficiency disease caused by shortage of A1 in the diet of human beings. ............................................................................................................................................. .............................................................................................................................................

Study the provided photographs that show different structures that indicate evidences of evolution (sets 1, 2 & 3), and answer questions that follow.

a)

i) Name the type of food fed on by organism shown in photograph A. .........................................................................................................................................................

ii) How are the feet of the bird whose beak is shown in photograph A adapted to Feed on the food you have given in a (i) above? .................................................................................................................................................. ...................................................................................................................................................

b) Identify the type of structure represented by the photograph set

i) 1..................................................................................

ii) 2..................................................................................

c) Name the type of evolution exhibited by the structure in photograph set

i) 2........................................................................................

ii) 3........................................................................................

d) Explain the importance of the processes that occurred in structures shown in photograph set 1 and 2 .................................................................................................................................................. ...................................................................................................................................................

e) Name a feature that is common to all the structures in photograph set 3. .................................................................................................................................................. ...................................................................................................................................................

f) The organism in photograph B has webbed feet. How would Lamarck have explained why such organisms have webbed feet only? .................................................................................................................................................. ...................................................................................................................................................