Form 2 Biology
Form 2 Biology
Form 2 Biology
1. Name the branch of Biology that deals with the study of animals (1 mark)
2. Give two characteristics that distinguish scientific names of organisms from the ordinary names.(2 marks)
3. a). Guinea grass is a common type of grass that grows in East Africa. Its
scientific name is Panicum maximum.
i). What is it species name? (1 mark)
ii). Which genus does it belong? (1 mark)
b). i). The scientific name of a certain cockroach is Paviplaneta Americana.
Where does its species name suggest it comes from? (1 mark)
ii). A student wrote the binomial name of the African Elephant as `loxodonta Africana’.
Explain what the student has done incorrectly. Rewrite the binomial name of the elephant
so that it is correct (2 marks)
c). There are 1500000 different types of organisms on earth. Why should we classify them(2 marks)
4. For each of the following examples state the characteristics of life that one being demonstrated.
a) A cheetah chasing after a gazelle (1 mark)
b) Somebody listening to the radio and clapping their hands in rhythm with the music.(2 marks)
c). A cow giving birth to a calf (1mark)
d). A footballer panting at the end of a game (1mark)
5. a). Define the term Diffusion (1 mark)
b). Mention two roles of Diffusion in living organisms (2 marks)
c). State three factors that affect the rate of Diffusion (3 marks)
6. Below is a diagram of the cell membrane
A
Distilled Beaker
water Sodium chloride
Sodium chloride solution
i). solution
What will happen to the visking tubing in M and N after two hours?
Distilled (2 marks) Visking
Visking tubing
ii). Explain the observation made in water
M. (2 marks)
tubing
1
iii). What does a visking tubing correspond to in a living organism (1mark)
9. a). Define the term cell specialization. (2 marks)
b). Give two examples of specialized cells. (2 marks)
10. A form one student, trying to estimate the size of onion cells observed the following on a microscopic
field of view.
12. Mention the main differences between plants and animals (4 marks)
Plants Animals
1.
2.
3.
13. Plant cells do not burst when placed in distilled water while animal cells burst. Explain (2 marks)
14. In a meal a person is advised to take more vegetable and fruits. What are the roles of these food
substances in digestion? (3 marks)
15. State three adaptations of aquatic plants to photosynthesis (3 marks)
16. Explain the importance of saliva in digestion (2 marks)
17. Study the dental formula below
I 0 ; C 0 ; PM 3 ; M 2 ;
4 0 3 3
2
(a) Identify with a reason, the mode of feeding of the animal whose dental formula is given above ( 3maks)
(b) Calculate the total number of teeth in the mouth of the above animal ( 1 mark)