Class 9 β Biology
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Textbooks β’ PCTB β’ π 1 β’ β¬ 0
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Practice MCQs β Biology
Q1. The study of plants is called:
β Correct: B β Botany = plants, Zoology = animals.
Q2. The basic unit of life is:
β Correct: C β All living organisms are made of cells; the cell is the structural and functional unit of life.
Q3. The study of microorganisms is called:
β Correct: B β Microbiology covers bacteria, viruses, fungi and other microscopic organisms.
Q4. Which is an example of an organ system?
β Correct: C β Organs working together (mouth, stomach, intestinesβ¦) form the digestive system.
Q5. Biodiversity means:
β Correct: B β Biodiversity is the variety of living organisms present in an area or on Earth.
Q6. A hypothesis is:
β Correct: C β A hypothesis is a testable proposed explanation, formed after observation and questioning.
Q7. Malaria in humans is caused by:
β Correct: B β Plasmodium is a protozoan parasite transmitted by female Anopheles mosquitoes.
Q8. The branch of biology that deals with the study of insects is:
β Correct: C β Entomology = insects, Ornithology = birds, Ichthyology = fishes.
Q9. The study of tissues is called:
β Correct: B β Histology is the microscopic study of tissues; Cytology is the study of cells.
Q10. Which organisation works for the conservation of nature internationally?
β Correct: B β IUCN (International Union for Conservation of Nature) works globally for nature conservation.
Q11. The first step in solving a biological problem is:
β Correct: B β Biological method starts with observation and recognition of a problem.
Q12. A deduction in the biological method is made from:
β Correct: B β Deductions are logical consequences drawn from the hypothesis (if... then...).
Q13. Who first saw Plasmodium in the blood of a malaria patient?
β Correct: C β Charles Laveran observed Plasmodium in 1880 in Algeria.
Q14. The hypothesis about malaria transmission by mosquitoes was given by:
β Correct: A β A.F.A. King formulated the mosquito-malaria hypothesis in 1883.
Q15. A theory becomes a law when it is:
β Correct: B β A scientific law is a theory verified by many experiments over a long time without exception.
Q16. In an experiment, the group kept under natural conditions for comparison is the:
β Correct: B β The control group provides the baseline for comparison.
Q17. Quantitative observations are recorded in the form of:
β Correct: B β Quantitative observations involve measurement, e.g. temperature, count, size.
Q18. Ronald Ross performed his famous experiments on malaria using:
β Correct: B β Ross used sparrows because human experimentation was not possible.
Q19. The female mosquito that transmits malaria is:
β Correct: C β Only female Anopheles mosquitoes transmit Plasmodium.
Q20. Biological problem solving is based on:
β Correct: B β It follows the scientific/biological method: observation, hypothesis, experiment, results.