Question 1

The diagram below shows the reproductive systems of a male human and a plant. Which of the following parts perform the same function in reproduction?

Accepted Answer

C. F and T. In the male human reproductive system, F represents the testis which produces male sex cells (sperm). In the plant, T represents the anther which produces male sex cells (pollen grains). Both F and T perform the same function of producing male reproductive cells.

Question 2

Which one of the following shows the correct sequence in the reproduction of a flowering plant?

Accepted Answer

D. pollination → fertilisation → seed dispersal → germination → pollination. The correct sequence in the reproduction of a flowering plant is: pollination (pollen transfer from anther to stigma) → fertilisation (male gamete fuses with female gamete) → seed dispersal (seeds spread away from parent) → germination (seed grows into a new plant), then the cycle repeats with pollination.

Question 3

The diagram below shows the fruits of three types of plants. The dispersal patterns W, X and Y of the three species are shown below. Which of the following shows the correct match between the types of plants and the dispersal patterns?

Accepted Answer

C. Type 1: W, Type 2: X, Type 3: Y. Type 1 (parachute-like fruit, e.g. dandelion) is dispersed by wind — pattern W shows young plants scattered widely in the wind direction. Type 2 (fruit with hooks/spines) is dispersed by animals — pattern X shows young plants clustered near the parent. Type 3 (pod-like fruit) is dispersed by splitting/explosive action — pattern Y shows young plants scattered moderately around the parent in a more localised pattern.

Question 4

The diagram below shows a seed. Lenny wanted to find out how the distance travelled by this seed is affected by its mass. Which of the following should be kept constant for a fair test? A. Mass of the seed; B. Length of the wing; C. Distance travelled by the seeds; D. Height from which he released the seeds

Accepted Answer

B. B and D. In a fair test investigating how mass (independent variable) affects distance travelled (dependent variable), the mass must change and the distance is measured. Therefore A (mass) and C (distance) cannot be kept constant. The length of the wing (B) and the height of release (D) are other variables that could affect distance and must be kept constant to ensure a fair test.

Question 5

Study the diagram below. Which of the following correctly identifies questions W and X, and object Y?

Accepted Answer

B. W: Is it matter? / X: Does it have a definite volume? / Y: air. A shadow is not matter (no mass, no volume), so the first question must be 'Is it matter?' (No → shadow). For matter, the next discriminator distinguishes the final two endpoints: sand has a definite volume and air does not. Question X is 'Does it have a definite volume?' (Yes → sand, No → air). Therefore Y is air.

Question 6

Gordon has three similar bars C, D and E, made of different materials. He labelled the ends of each bar T and R as shown. He placed the north pole of a magnet near each end of each bar. The table below shows his observations. Which of the following correctly shows what bars C, D and E are made of?

Accepted Answer

D. C: iron, D: aluminum, E: magnet. Bar C moves towards the magnet at both ends — this is iron (a magnetic material attracted to any pole). Bar D does not move at either end — this is aluminum (a non-magnetic material). Bar E moves towards the magnet at one end and away at the other — this is a magnet (attracted at the south pole end, repelled at the north pole end when the north pole of the test magnet is brought near).

P5 Science CA1 2025 — Anglo Chinese

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