Question 1
(a) Name two branches of Biology that an oncologist needs to study in detail
(b) Some form one students wanted to collect the following animals for study in the laboratory. State the suitable apparatus they should use
i) Housefly
ii) Scorpion
Answer
(a) 1. Cytology;
2. Physiology
(b) i) sweep net
ii) pair of forceps
2. Physiology
(b) i) sweep net
ii) pair of forceps
Question 2.
A group of students were walking in the forest and they came across two organisms A and B showing the following characteristics
State the class to which each organism belongs
Answer
A - Diplopoda
B - Chilopoda
B - Chilopoda
Question 3
Name the organelle responsible for
- i. Detoxification
ii. Synthesis of Adenosine triphosphate molecules.
iii. Synthesis of ribosomes
iv. Transport of packaged glycoproteins - Give reasons for carrying out the following procedures during preparation if temporary wet mounts of plant tissues
i. Making thin sections
ii. Placing a cover slip over the plant section.
Answer
- i. Smooth endoplasmic reticulum
ii. Mitochondrion
iii. Nucleolus
iv. Golgi bodies -
i.To allow light to pass through.
ii.Prevent dust from getting into the specimen
Question 4
Write down the part of microscope that plays the following role
Answer
i. Coarse adjustment knob
ii. Revolving nose piece
ii. Revolving nose piece
Question 5
A group of students set up an experiment as shown below. The experimental setups were left for 20 minutes.
The observations after 20 minutes were as shown in the table below
(a) State the process being demonstrated in this experiment
(b) Why was there no blue black colour inside the visking tubing in setup B?
Answer
(a) DIFFUSION
(b) Starch molecules are too large and cannot pass across visking tubing iodine diffuses into the visking tubing making starch solution turn blue black
(b) Starch molecules are too large and cannot pass across visking tubing iodine diffuses into the visking tubing making starch solution turn blue black