Question 1
Some form one students wanted to collect the following animals for study in the laboratory. State the suitable apparatus they should use.
ii) Scorpion
iii) Ants
Answer
i) Housefly - Sweep net.
ii) Scorpion - Pair of foreceps.
iii) Ants - Pooter.
ii) Scorpion - Pair of foreceps.
iii) Ants - Pooter.
Question 2
State two reasons why a snake is classified as a reptile.
Answer
1. Skin is dry and covered by a horny/leathery scales
2. Fertilisation is internal
2. Fertilisation is internal
Question 3
a) Explain the role of oxygen in Active transport.
b) Name two processes that depend on Active transport in animals.
Answer
a) Oxidize food to produce energy required in active transport.
b) 1. Reabsorption of sugar and some salts by kidney
2. Absorption of digested food from alimentary canal.
b) 1. Reabsorption of sugar and some salts by kidney
2. Absorption of digested food from alimentary canal.
Question 4
Explain how sunken stomata lower the rate of transpiration.
Answer
Form pits that accumulate moisture; lowering saturation deficit between the atmosphere and sub stomatal airspaces; reducing transpiration.
Question 5
State how xylem vessel is adapted to its function.
Answer
- Lignified walls to prevent them from collapsing /offer support
- Hollow and tubular for continuous flow of water
- Narrow to enhance capillarity
- Made of dead cells; /to reduce water demand
- Hollow and tubular for continuous flow of water
- Narrow to enhance capillarity
- Made of dead cells; /to reduce water demand