Name the male and female gametes in animals. What is fertilization and where does it take place in human females?
Updated 1/19/2026
What is the role of saliva in the digestion of food?
Updated 1/19/2026
(a) List two differences between ‘holozoic nutrition’ and ‘saprophytic nutrition. Give two examples each of these two types of nutrition. (b) State the roles of liver and pancreas. (c) Name the organ which performs the following functions in humans: Absorption of digested food Absorption of water. (d) Explain the statement, “Bile does not contain any enzyme but it is essential for digestion.”
Updated 1/19/2026
Define (a) Biomass (b) Anaerobic degradation.
Updated 1/19/2026
A high concentration of harmful chemical is highly injurious, even fatal to higher trophic level organisms. Mention the basis of classifying substances as biodegradable and non-biodegradable. Give two examples of each.
Updated 1/19/2026
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