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Combined Science — Biology Flashcards

6 cards from real O-LEVEL practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 6 Combined Science — Biology flashcards as text

  1. What is the process by which water moves from an area of high water potential to low water potential through a semi-permeable membrane?

    Answer: Osmosis

    Osmosis is the net movement of water molecules through a partially permeable membrane from an area of higher water potential to lower water potential.

  2. Which part of the plant absorbs water and minerals from the soil?

    Answer: Root hair cells

    Root hair cells have a large surface area and thin walls to maximise absorption of water and mineral ions from the soil.

  3. What is the role of enzymes in the body?

    Answer: To act as biological catalysts

    Enzymes are biological catalysts that speed up chemical reactions in the body without being consumed. Each enzyme has a specific substrate.

  4. What is the term for the variety of different species in an ecosystem?

    Answer: Biodiversity

    Biodiversity refers to the variety of life in a given area, including the number and variety of different species.

  5. Where does fertilisation occur in the human female reproductive system?

    Answer: Fallopian tube

    Fertilisation typically occurs in the fallopian tube (oviduct), where the sperm meets the egg after ovulation.

  6. What is a food chain?

    Answer: A sequence showing how energy passes from one organism to another

    A food chain shows the linear sequence of organisms through which energy and nutrients pass as one organism eats another.

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  1. file.go.gov.sg — Retake policy · verified Nov 2026
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