WASSCE Biology · Paper 1 style

Transport

One sample question with the full working. 3 more in the app, with instant feedback and repair sessions for the traps below.

The organ that pumps blood round the body is the

Alungs
Bliver
Ckidney
Dheart

Show the answer and working

Answer: D

Pump = heart.

Trap A Gives the job of a neighbouring structure or stage: Learn structures as pairs of 'name → one job' and contrast neighbours: ribosome makes protein, mitochondrion releases energy; cochlea hears, semicircular canals balance. When two options sit in the same organ or process, ask which one does exactly the job in the stem.

Trap B 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 C Excretion misconceptions: Excretion removes metabolic wastes: kidneys (urea, water, salts), lungs (CO2, water), skin (sweat). Egestion of faeces is not excretion. Plants excrete O2, CO2, and store wastes in leaves/bark.

Traps in Transport

Gives the job of a neighbouring structure or stage
Learn structures as pairs of 'name → one job' and contrast neighbours: ribosome makes protein, mitochondrion releases energy; cochlea hears, semicircular canals balance. When two options sit in the same organ or process, ask which one does exactly the job in the stem.
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.
Excretion misconceptions
Excretion removes metabolic wastes: kidneys (urea, water, salts), lungs (CO2, water), skin (sweat). Egestion of faeces is not excretion. Plants excrete O2, CO2, and store wastes in leaves/bark.
Mixes up blood cell functions
Red cells (no nucleus, haemoglobin) carry O₂; white cells defend (phagocytes engulf, lymphocytes make antibodies); platelets help clotting.
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.
Mismatches hormones and functions
Insulin (pancreas) lowers blood glucose; ADH (pituitary) reduces urine volume; adrenaline prepares for 'fight or flight'; thyroxine controls metabolic rate.

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