Noesis
Level 1 — RecognitionWhat Is Biology & Characteristics of Life

What Is Biology & Characteristics of Life

⏱ 20 minutes30 marksprintable — key stays hidden on paper

Level 1 Assessment — Recognition

Time Limit: 20 minutes Total Marks: 30

Section A — Multiple Choice (1 mark each) — 10 marks

Choose the single best answer.

Q1. The scientific study of life is called:

  • A) Geology B) Biology C) Ecology D) Chemistry

Q2. Which sub-discipline of biology studies the interactions between organisms and their environment?

  • A) Genetics B) Anatomy C) Ecology D) Cytology

Q3. The building-up of complex molecules from simpler ones, using energy, is called:

  • A) Catabolism B) Anabolism C) Excretion D) Respiration

Q4. Which sequence correctly orders the levels of biological organization from smallest to largest?

  • A) Cell → Tissue → Organ → Organism
  • B) Organ → Tissue → Cell → Organism
  • C) Tissue → Cell → Organ → Organism
  • D) Organism → Organ → Tissue → Cell

Q5. The basic structural and functional unit of life is the:

  • A) Atom B) Molecule C) Cell D) Tissue

Q6. Maintaining a stable internal environment (e.g., constant body temperature) is called:

  • A) Metabolism B) Reproduction C) Homeostasis D) Adaptation

Q7. In an experiment testing how light intensity affects plant growth, the independent variable is:

  • A) Plant growth B) Light intensity C) Water amount D) Temperature

Q8. A well-tested, broad explanation supported by much evidence is a scientific:

  • A) Hypothesis B) Guess C) Theory D) Observation

Q9. The metric prefix "milli-" represents a factor of:

  • A) 10−210^{-2} B) 10−310^{-3} C) 10310^{3} D) 10−610^{-6}

Q10. Reproduction that involves only one parent and produces genetically identical offspring is:

  • A) Sexual B) Asexual C) Mutation D) Fertilisation

Section B — Matching (1 mark each) — 6 marks

Q11. Match each term in Column X with its correct description in Column Y. Write the letter.

Column X Column Y
(i) Irritability A. Change in a species over many generations that improves survival
(ii) Adaptation B. Response to a stimulus
(iii) Anatomy C. Study of the structure of organisms
(iv) Independent variable D. Factor deliberately changed by the experimenter
(v) Controlled variable E. Factor kept constant to ensure a fair test
(vi) Emergent property F. New feature arising at a higher level of organization

Section C — True / False WITH Justification (2 marks each) — 14 marks

State True or False (1 mark) and give a one-sentence justification (1 mark).

Q12. A dead leaf is classified as a non-living thing.

Q13. Catabolism releases energy by breaking down molecules.

Q14. A scientific law explains why a phenomenon happens.

Q15. The control group in an experiment does not receive the factor being tested.

Q16. When a person's blood glucose rises after a meal, the release of insulin to lower it is an example of homeostasis.

Q17. All levels of biological organization are: atom → molecule → cell → tissue → organ → organ system → organism → population → community → ecosystem → biosphere.

Q18. On a line graph, the manipulated (independent) variable is normally plotted on the vertical (y) axis.

Answer keyMark scheme & solutions

Section A (1 mark each)

Q Ans Why
1 B Biology = bios (life) + logos (study); the study of life.
2 C Ecology studies organism–environment interactions.
3 B Anabolism builds complex molecules and consumes energy; catabolism breaks down.
4 A Correct ascending order: cell < tissue < organ < organism.
5 C Cell theory: the cell is the basic unit of structure and function.
6 C Homeostasis = maintaining a stable internal environment.
7 B The factor deliberately changed (light) is independent; growth is the measured (dependent) variable.
8 C A theory is a broad, well-supported explanation; a hypothesis is a testable prediction.
9 B milli- = 10−310^{-3} (one-thousandth).
10 B Asexual reproduction: one parent, genetically identical offspring.

Section B (1 mark each)

Q11.

  • (i) → B (irritability = response to stimulus)
  • (ii) → A (adaptation improves survival over generations)
  • (iii) → C (anatomy = study of structure)
  • (iv) → D (independent variable is deliberately changed)
  • (v) → E (controlled variable kept constant for a fair test)
  • (vi) → F (emergent property appears at a higher level)

Section C (1 mark answer + 1 mark justification)

Q12. FALSE. A dead leaf was once part of a living organism, so it is classified as once-living, not non-living. (T/F 1 + reason 1)

Q13. TRUE. Catabolism breaks down complex molecules into simpler ones, releasing stored energy (e.g., respiration). (1 + 1)

Q14. FALSE. A scientific law describes what happens (often mathematically) but does not explain why; a theory provides the explanation. (1 + 1)

Q15. TRUE. The control group lacks the tested factor, providing a baseline for comparison so results can be attributed to that factor. (1 + 1)

Q16. TRUE. Insulin lowering raised blood glucose keeps it within a stable range — a homeostatic (negative feedback) response. (1 + 1)

Q17. TRUE. The listed sequence is the correct order of biological organization from atom to biosphere. (1 + 1)

Q18. FALSE. The independent variable is plotted on the horizontal (x) axis; the dependent variable goes on the vertical (y) axis. (1 + 1)

Total: 30 marks

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  {"claim":"milli prefix equals 10^-3","code":"result = (Rational(1,1000) == 10**-3)"},
  {"claim":"Section A has 10 marks (10 MCQ x 1)","code":"result = (10*1 == 10)"},
  {"claim":"Section B has 6 matching items worth 6 marks","code":"result = (6*1 == 6)"},
  {"claim":"Section C: 7 T/F questions x 2 marks = 14, total paper = 30","code":"secC = 7*2; total = 10 + 6 + secC; result = (secC == 14 and total == 30)"}
]