FORM TWO HOLIDAY ASSIGNMENT 2025
BIOLOGY FORM 2
1. Explain the following terms.
a) Taxonomy (1 mark)
b) Species (1 mark)
2. State two main functions of a microscope. (2 marks)
3. State two functions played by the cell wall in plant cells and give the adaptation of the cell wall to
performing each of the stated functions. (4 marks)
Function Adaptation
4. The experiment illustrated below was set up to investigate a certain physiological process using a raw tuber
Concentrated glucose
solution
Raw potato tuber
Trough
Distilled
water
(a) Suggest the physiological process that was being investigated.
(1 mark)
(b)Explain the results obtained in the above experiment after a few hours
(2 marks)
(c)State the observations that would have been made if the experiment was repeated using boiled potato.
(2 marks)
5. (a)State two importance of active transport in living organisms (2 marks)
(b)Why is oxygen concentration important in active transport? (1 mark)
6. What is the significance of each of the following in photosynthesis?
(i) Chlorophyll in the leaf (1 mark)
(ii) Stomata on the leaf surfaces (1 mark)
(iii) Leaf midrib and veins (1 mark)
7. Name the form in which carbohydrates are stored in. (2 marks)
i). Plants tissues
ii). Animal tissues
8. An animal has the following dental formula
I 3 c 1 pm 4 m 2
Page 1 of 3
3 1 4 3
a) Calculate the number of teeth. (1 mark)
b) Explain what would result from blockage of bile duct. (2 marks)
9. The diagram below shows how food boles move along the human oesophogus and the Intestine
(a) Identify the process illustrated in the diagram (1 mark)
(b) Name one component of a person’s diet that assists in the movement of food described in
from position 1 and position 2 (1 mark)
10. The table below show the percentage composition of carbon (IV) oxide and oxygen inhales and exhales air
Gases Inhaled Exhaled
air air
Oxygen 20% 17%
Carbon 0.04% 4.0%
(IV) oxide
Explain the differences in the percentage of the two gases in inhaled and exhaled air.
(2 marks)
11. The table below shows the energy use per day in kilojoules
Age(years) Male Female
2 5,500 5,500
5 7,000 7,000
8 8,800 8,000
11 10,000 9,200
14 12,500 10,500
18 14,200 9,600
25 12,100 8,800
a). From the table, explain why after age 8 males require more energy than
females. (1 mark)
b). Other than sex and age, name two other factors that determine energy requirements in human
beings (2 marks)
12. a). Distinguish between single and double circulatory system (1mark)
(b) Name two defects of the circulatory system in humans. (2 marks)
(c) State two functions of blood other than transport. (2 marks)
Page 2 of 3
13. State two adaptations of xylem to water transportation (2 marks)
14. The graph below show the effect of temperature on an enzyme catalyzed reaction.
B X C
Rate of
Reaction
A
D
ss
Temperature
(a) Account for the shape of the curve between.
(i)A and B. (3 marks)
(ii)C and D. (2 marks)
(b)What does the point marked X represent? (1 mark)
(c) Apart from temperature, state two other factors that affect the rate of enzyme controlled reaction.
(2 marks)
14. (a)Distinguish between the terms homodont and heterodont. (1mk)
(b) What is the function of carnassials teeth? (1mk)
(c) A certain animal has no incisors, no canines, 6 premolars and 6 molars in it’s upper jaw. In the
lower jaw, there are 6 incisors 2 canines, 6 premolars and 6 molars. Write its dental formula.(1mk)
Page 3 of 3
