PSLE Science Biology Topics 1 — Questions and Answers
Question 1: Which part of a plant absorbs water and minerals from the soil?
- Leaves
- Stem
- Roots (Correct answer)
- Flowers
Correct answer: Roots
Roots absorb water and mineral salts from the soil through root hairs, which increase the surface area for absorption.
Question 2: What is the main function of the leaf in a plant?
- To anchor the plant
- To absorb water
- To make food through photosynthesis (Correct answer)
- To attract insects
Correct answer: To make food through photosynthesis
Leaves are the main site of photosynthesis, where the plant uses sunlight, water, and carbon dioxide to make food (glucose).
Question 3: Which gas do plants absorb during photosynthesis?
- Oxygen
- Nitrogen
- Carbon dioxide (Correct answer)
- Hydrogen
Correct answer: Carbon dioxide
During photosynthesis, plants absorb carbon dioxide from the air and use it along with water and sunlight to produce glucose and oxygen.
Question 4: What is the role of the stem in a plant?
- To make food
- To reproduce
- To transport water and nutrients (Correct answer)
- To store seeds
Correct answer: To transport water and nutrients
The stem transports water and minerals from the roots to the leaves, and food from the leaves to other parts of the plant.
Question 5: Which of the following is NOT a characteristic of living things?
- Growth
- Respiration
- Movement
- Rusting (Correct answer)
Correct answer: Rusting
Rusting is a chemical reaction in metals, not a characteristic of living things. Living things grow, respire, and move.
Question 6: What is the function of the flower in a plant?
- To absorb sunlight
- To carry out reproduction (Correct answer)
- To transport water
- To store minerals
Correct answer: To carry out reproduction
Flowers are the reproductive organs of a plant. They contain pollen (male) and ovules (female) needed for reproduction.
PSLE Science Biology Topics 1
Which part of a plant absorbs water and minerals from the soil?