PSLE Science Biology Topics 4 — Questions and Answers
Question 1: What is pollination?
- The growth of a seed into a plant
- The transfer of pollen from anther to stigma (Correct answer)
- The process of making food in leaves
- The spreading of seeds
Correct answer: The transfer of pollen from anther to stigma
Pollination is the transfer of pollen grains from the anther (male part) to the stigma (female part) of a flower.
Question 2: Which of the following is an example of a producer in a food chain?
- Rabbit
- Grass (Correct answer)
- Eagle
- Mushroom
Correct answer: Grass
Grass is a producer because it makes its own food through photosynthesis. Producers form the base of food chains.
Question 3: What is the function of white blood cells?
- To carry oxygen
- To fight germs and diseases (Correct answer)
- To clot blood
- To digest food
Correct answer: To fight germs and diseases
White blood cells are part of the immune system. They fight bacteria, viruses, and other pathogens that enter the body.
Question 4: Which of the following is a characteristic of amphibians?
- They have feathers
- They can live on land and in water (Correct answer)
- They are always warm-blooded
- They have scales and lay hard-shelled eggs
Correct answer: They can live on land and in water
Amphibians (like frogs and toads) can live both on land and in water. They typically start life in water and move to land as adults.
Question 5: What is the largest organ of the human body?
- Heart
- Liver
- Brain
- Skin (Correct answer)
Correct answer: Skin
The skin is the largest organ of the human body. It protects internal organs, regulates temperature, and provides sensation.
Question 6: What is the process by which seeds are spread to new locations?
- Germination
- Pollination
- Seed dispersal (Correct answer)
- Fertilisation
Correct answer: Seed dispersal
Seed dispersal is how seeds are spread away from the parent plant by wind, water, animals, or explosive mechanisms.
PSLE Science Biology Topics 4
What is pollination?