WASSCE Biology · Paper 1 style

Disease

One sample question with the full working. 1 more in the app, with instant feedback and repair sessions for the traps below.

Malaria is transmitted by the

Afemale Anopheles mosquito
Bhousefly
Ctsetse fly
DPlasmodium itself flying

Show the answer and working

Answer: A

Malaria vector: Anopheles.

Trap B Confuses vector and causative organism: The PATHOGEN causes disease (Plasmodium); the VECTOR carries it (female Anopheles). Control can target either.

Trap C Transfers a feature to the wrong organism group: Keep a feature grid: rows = groups (bacteria, fungi, mosses, ferns, conifers, flowering plants, insects, fish, mammals), columns = wall, nucleus, gas exchange, reproduction. Check the option against the right row.

Trap D Takes one contributing factor as the whole answer: Watch for 'only', 'just', 'mainly'. Ask: is this the MAIN reason, or one contributor? If it would need other things to work (plasma proteins need platelets), it is incomplete.

Traps in Disease

Confuses vector and causative organism
The PATHOGEN causes disease (Plasmodium); the VECTOR carries it (female Anopheles). Control can target either.
Transfers a feature to the wrong organism group
Keep a feature grid: rows = groups (bacteria, fungi, mosses, ferns, conifers, flowering plants, insects, fish, mammals), columns = wall, nucleus, gas exchange, reproduction. Check the option against the right row.
Takes one contributing factor as the whole answer
Watch for 'only', 'just', 'mainly'. Ask: is this the MAIN reason, or one contributor? If it would need other things to work (plasma proteins need platelets), it is incomplete.

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