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FORM 3 BIOLOGY QUIZ

Identify the surfaces of gaseous exchange in the following:-                                                      

                (i) amoeba

                (ii) Roots;            

                (iii) Frog;

            (b) Explain how oxygen gets into the tissues of an insect

Describe the changes that occur to the rib cage and the diaphragm during inspiration

Give a reason for each of the following on mammalian Red blood cells                                  

  • Absence of the nucleus       
  • Biconcave shape

State two ways in which the surface area of the fish filaments is increased for efficient gaseous

                  Exchange

25.          Why should respiratory surfaces be: 

 (i) Moist             

 (ii) Thin               

State any two structures used for gaseous exchange in plants.

Name any two sites where gaseous exchange takes place in a leaf of a terrestrial plant

  • Describe the mechanism of inhalation in man.

Describe the mechanism of opening and closing of the stomata using the the three theories

Com[plete the table below to show how various food tests are done

Food Substance Procedure Observation Conclusion
  Put test substance in the t. tube Add benedict soln.Boil – Colour changes to yellow/orange/red  
Vit. C Ascorbic acid           – Vit. C present.
Protein             – No colour change – Protein absent.