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Introduction to biology

Read the chapter notes, short questions and numericals for this topic

Written by Dr. Hira Salman (Biology)

20 Class 9 Biology questions with answers and explanations.

Printable worksheet with answer key

All questions with answers
  1. The study of living things is called:

    • 1 Biology
    • 2 Chemistry
    • 3 Astronomy
    • 4 Geology
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    Correct answer: Biology

    Biology is the science of life.

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  2. The study of the structure of living things is called:

    • 1 Ecology
    • 2 Genetics
    • 3 Anatomy
    • 4 Physiology
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    Correct answer: Anatomy

    Anatomy deals with structure. Physiology deals with how structures work.

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  3. The study of plants is called:

    • 1 Entomology
    • 2 Botany
    • 3 Zoology
    • 4 Microbiology
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    Correct answer: Botany

    Botany is the branch of biology that studies plants.

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  4. The study of the relationship between organisms and their environment is:

    • 1 Embryology
    • 2 Ecology
    • 3 Anatomy
    • 4 Taxonomy
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    Correct answer: Ecology

    Ecology studies how organisms interact with each other and their surroundings.

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  5. The correct order of levels of organisation from small to large is:

    • 1 Cell, tissue, organ, organ system
    • 2 Organ system, organ, tissue, cell
    • 3 Organ, tissue, cell, organ system
    • 4 Tissue, cell, organ system, organ
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    Correct answer: Cell, tissue, organ, organ system

    Cells form tissues, tissues form organs, and organs form organ systems.

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  6. The study of fossils is called:

    • 1 Pathology
    • 2 Physiology
    • 3 Pharmacology
    • 4 Palaeontology
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    Correct answer: Palaeontology

    Palaeontology is the study of fossils.

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  7. A group of tissues working together forms an:

    • 1 Molecule
    • 2 Organ
    • 3 Organelle
    • 4 Cell
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    Correct answer: Organ

    Tissues combine to form an organ.

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  8. The study of heredity is called:

    • 1 Botany
    • 2 Ecology
    • 3 Genetics
    • 4 Embryology
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    Correct answer: Genetics

    Genetics studies how traits are inherited.

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  9. The branch of biology that deals with animals is:

    • 1 Botany
    • 2 Virology
    • 3 Zoology
    • 4 Mycology
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    Correct answer: Zoology

    Zoology is the study of animals.

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  10. Which of these is a characteristic of all living things?

    • 1 Having wings
    • 2 Making sound
    • 3 Growth
    • 4 Being green
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    Correct answer: Growth

    All living things grow and develop.

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  11. The study of the internal structure of organisms is called:

    • 1 Ecology
    • 2 Anatomy
    • 3 Taxonomy
    • 4 Morphology
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    Correct answer: Anatomy

    Anatomy deals with internal structure.

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  12. Which branch of biology deals with classification of organisms?

    • 1 Genetics
    • 2 Taxonomy
    • 3 Physiology
    • 4 Embryology
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    Correct answer: Taxonomy

    Taxonomy names and classifies organisms.

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  13. The study of heredity and variation is:

    • 1 Cytology
    • 2 Genetics
    • 3 Ecology
    • 4 Microbiology
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    Correct answer: Genetics

    Genetics studies how traits pass from parents to offspring.

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  14. A group of similar cells that do one job is a:

    • 1 Organ system
    • 2 Tissue
    • 3 Population
    • 4 Organ
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    Correct answer: Tissue

    A tissue is a group of similar cells with one function.

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  15. A group of organisms of the same species living in one place is a:

    • 1 Ecosystem
    • 2 Biosphere
    • 3 Community
    • 4 Population
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    Correct answer: Population

    This is the definition of a population.

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  16. The part of the earth where life exists is the:

    • 1 Community
    • 2 Biosphere
    • 3 Habitat only
    • 4 Ecosystem
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    Correct answer: Biosphere

    The biosphere includes all places where life is found.

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  17. Biochemistry joins biology with:

    • 1 Chemistry
    • 2 Geography
    • 3 Physics
    • 4 Mathematics
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    Correct answer: Chemistry

    It studies the chemical reactions in living things.

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  18. Which level of organisation comes just before the organism?

    • 1 Population
    • 2 Organ system
    • 3 Community
    • 4 Tissue
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    Correct answer: Organ system

    Organ systems work together to make an organism.

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  19. The study of microscopic organisms such as bacteria is:

    • 1 Anatomy
    • 2 Embryology
    • 3 Microbiology
    • 4 Ecology
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    Correct answer: Microbiology

    Microbiology deals with microorganisms.

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  20. Making insulin using bacteria is an example of:

    • 1 Morphology
    • 2 Embryology
    • 3 Biotechnology
    • 4 Taxonomy
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    Correct answer: Biotechnology

    Biotechnology uses living organisms to make useful products.

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