BOMET BIOLOGY PAPER 1 2010 QUESTION 12 TO 27 - 16 January 2011 - KCSE REVISION E LEARNING
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Main » 2011 » January » 16 » BOMET BIOLOGY PAPER 1 2010 QUESTION 12 TO 27
10:40 PM
BOMET BIOLOGY PAPER 1 2010 QUESTION 12 TO 27
  1. The diagram below represents the internal structure of a bean seed 

 

Hypocotyl

 

Y

 

X

 

plumule

 
bio pp1 q 12

 

        (a) Name the parts of the seed embryo represented by letter X and Y                                    (2mks)

               X……………………………..

 

               Y…………………………

 

       (b) What type of germination would result if the hypocotyl elongates faster                           (1mk)

 

       (c) What is the significance of the part labeled Y emerging first during germination             (1mk)

 

 

 

  1. (a) State two advantages which a constant body temperature gives mammals and birds over the animals                                                                                                                                (2mks)

 

 

 

(b) How does body size affects heat loss in an animal                                                        (1mk)

 

 

(c) How does sweating increase heat loss in mammals                                                      (3mks)

 

 

 

 

 

  1. (a) Study the diagram below and answer the questions that follows  

 

 

C

 

B

 

A

 

Polar nuclei

 
bio pp1 q 14

 

 

        Name the parts labeled A, B and C                                                                                        (3mks)

                   A………………………………..

 

                   B………………………………

 

                    C……………………………………………………

 

           (b) What does the part B form after fertilization                                                                  (1mk)

 

 

  1. What are the differences between  male and female gametes of human beings                 (3mks)

 

 

 

 

 

  1. State three unique features of class insecta                                                                        (3mks)

 

 

 

 

  1. What type of evolution is illustrated by the pentadacytl limb                                             (1mk)

 

 

  1. Study  the diagram below and answer the following questions

 

 

D

 

B

 

C

 

A

 
bio pp1 q 18

 

 

          (a) Name the bones labeled C and D                                                                                    (2mks)

 

 

 

 

 

         (b) What happen to structure A and B as the arm is straightened                                           (1mk)

 

 

 

  1. Define the following terms used in genetics

(a) Cloning                                                                                                                            (1mk)

 

 

(b) Gene therapy                                                                                                                    (1mk)

 

 

 

  1. Name  the blood vessel

(i) Bearing blood with less oxygen and at the lowest pressure                                            (1mk)

 

 

(ii) That link arterioles to venules                                                                                        (1mk)

 

 

(iii) State two forms in which carbon (IV) oxide is transported in blood                          (2mks)

 

 

         

  1. Explain what happens when the erector pili muscle of the skin contract                           (3mks)

 

 

 

 

 

 

  1. Give three differences nervous and hormonal communication                                          (3mks)

 

 

 

 

 

 

  1. The diagram below represent a pyramid of bio mass derived from a certain ecosystem














 

 

 

 

 

 

 

 

 

 


          (a) Suggest the type of ecosystem from which the pyramid was derived                              (1mk)

 

 

         (b) State the significance of short food chains in ecosystem                                                  (1mk)

 

 

 

  1. In an experiment some germination seeds were placed in a large air tight flask for four days   

(a) What are the expected changes in composition of oxygen and carbon (IV) oxide        (1mk)

 

 

(b) Give reason for your answer to (a) above                                                                     (3mks)

 

 

 

 

 

  1. Name the hormone secreted by human placenta                                                                  (1mk)

 

 

 

 

 

 

 

  1. The state of dormancy in which some animals go into during the dry season is called      (1mk)

 

 

 

 

 

  1. State the two economic importance of the plants in class dicotyledonae                           (2mks)

 

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2 Stephen kamau   (23/01/2012 11:14 PM)
Give me the answers to the questions

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1 maureen   (06/12/2011 1:50 AM)
diagrams please.......**********

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