What is the role of the organism named in (d)(i) above? List two scientific skills developed by studying biology other than observation.

4. (ii) What is the role of the organism you named in (d) (i) above?
The role of the organism (decomposer) is breaking down dead organisms (plants and animals) and recycling nutrients. Decomposers convert complex organic matter into simpler inorganic substances, making nutrients available for other organisms.

4. (a) Give the precautions the biology teacher gave the student before the practical when collection of specimen begun.
The precautions given were:

• Collect only the necessary number of specimens to avoid wastage.
• Do not destroy the natural habitat of the specimens.
• Handle live specimens with care and return them to their natural habitat after observation.

4. (b) What was the function of the following apparatus?

i) Pooter:
A pooter is used for collecting small insects and other invertebrates from surfaces like rough bark or soil without direct handling.

ii) Sweep net:
A sweep net is used for catching flying insects from vegetation or in the air.

iii) Chloroform:
In biology practicals, chloroform is used as an anesthetic to immobilize or kill small organisms for examination or preservation. It is also a solvent for lipids and other organic compounds.

4. (b) Other than observation, name other two scientific skills developed by studying biology.
Other scientific skills developed include:

• Analysis
• Classification