What is geographical isolation? (b) Illustrate formation of a species with the help of an example where individuals are very different from each other and are capable of reproduction among themselves.
Updated 1/12/2026
(b) What is • Phototropism and • Geotropism? With labelled diagrams describe an activity to show that light and gravity change the direction that plant parts grow in. (b) Mention the role of each of the following plant hormones: • Auxin • Abscisic acid.
Updated 1/12/2026
Define variations in relation to a species. Why is variation beneficial to the species?
Updated 1/12/2026
(a) List three events that occur during the process of photosynthesis. State in brief the role of stomata in this process. (b) Describe an experiment to show that sunlight is essential for photosynthesis.
Updated 1/12/2026
Define (a) Biomass (b) Anaerobic degradation.
Updated 1/12/2026
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