(iii) Alveoli

c.
1. Define work.
2. A stone of mass 500.0 g is raised to a height of 20.0 m above the ground. If the acceleration due to gravity is 10.0 m/s[tex]\(^2\)[/tex], calculate the work done on the stone.

d.
1. Explain the term poultry as used in animal production.
2. Give three advantages of exotic breeds of birds over local breeds.

3.

a.
1. Explain how gaseous exchange in plants occurs during the night.
2. Describe briefly how plants excrete water.

b. An electrical appliance rated 1.5 kW, 240 V is left running for 2 hours. Calculate the
1. current drawn;
2. electrical energy consumed.

c.
1. Explain the term animal breed.
2. Name three breeds of rabbits.