Introduction to Biology, Divisions & Branches

Introduction to Biology is the Topic: 1.1

Introduction to Biology

The following topics are included in this section:-

  • What is Science
  • 2 Main Stream of Sciences
  • What is Biology
  • Division of Biology
  • Branches of Biology
  • Relationship of Biology with Other Sciences

What is Science?

The word “Science” is derived from the Latin word “Scientia” which means knowledge. Science is the knowledge gained from observations and experiments.

The word “___” is derived from the ____ word “____” which means ______.

Remember this with blanks, it will help to easily learn “what is physics”

Other Definitions of Science

  • Science is the study of the world around us.
  • Science is the process of learning about the natural world through observation and experimentation.
  • Science is all about improving our knowledge of the universe.
  • Science is how we try to improve our knowledge and understanding of the universe.

What are the two main streams of Science or Natural Philosophy?

In the 18th century, science was divided into the following two main streams:-

  1. Physical Sciences. This steam of science deals with the study of non-living things
  2. Biological (Life) Sciences. This steam of science deals with the study of living things

This stream of science deals with the study of _____ things.

Easy to remember, just fill the blank with non-living or living for both definitions.

Other Definitions of Physical Science

  • Physical science is the systematic study of the inorganic world.
  • Physical Science deals with the structure of matter and the interactions between the fundamental constituents of the observable universe

Other Definitions of Biological Science

  • Biological Science is the systematic study of the organinic world.
  • Biological Sciences is the study of life and living organisms

What is Biology?

The word “Biology” is derived from the two Greek words “Bios” which means life and “Logos” which means thought, reasoning, and study. Biology is a biological science which studies living organisms. It helps us to explain how living things relate to one another and to their surroundings.

Other Definitions of Biology

  • Biology is the study of life.
  • Biology is a branch of science that deals with living organisms and vital processes.
  • Biology is the science of life and of living organisms, including their structure, function, growth, origin, evolution, and distribution.

Define the three main divisions of Biology

Biology is divided into three main divisions in order to make the study of Biology convenient.

  1. Botany. Botany is the division of Biology which deals with the study of plants.
  2. Zoology. Zoology is the division of Biology which deals with the study of animals
  3. Microbiology. Microbiology is the division of Biology which deals with the study of micro (tiny, small) living organisms e.g., viruses, bacteria etc.

_____ is the division of Biology which deals with the study of ______.

Easy to remember, just fill the blanks for above three definitions of divisions of Biology.

Define the major branches of Biology.

There are 16 major branches of biology included in the coursebook as under:-

MAP SHEET BIG PEPP C

Hint to remember the names of biology branches
  1. Morphology. It is the branch of biology which studies the form and external structure of the organisms.
  2. Anatomy (Internal Morphology). This branch of biology deals with the study of internal structure of the organisms.
  3. Physiology. This branch of biology studies the function of various organs of the organisms.
  4. Socio-biology. The study of social behavior of the insects and animals that make societies e.g, ants, and honey-bee etc.
  5. Histology. It is the branch of biology which deals with the microscopic study of tissues of organisms.
  6. Embryology. The study of developmental stages of an organism from egg to the formation of a new organism is called embryology.
  7. Environmental Biology (Ecology). The study of the interrelationship of organisms and their environment is called environmental biology or ecology.
  8. Taxonomy. The classification and naming of organisms is called taxonomy.
  9. Biotechnology. The study of use of different techniques to manipulate the living organisms for the benefit of mankind is called biotechnology.
  10. Immunology. The study of immunity is called immunology. Immunity is the ability of the body to protect itself from foreign substances and cells inlcuding infectious microbes.
  11. Genetics. The study of genes and heredity in organisms is called genetics.
  12. Palaeontology. The study of fossils is called palaeontology.
  13. Entomology. The study of insects is called entomology.
  14. Parasitology. The study of parasites is known as parasitology.
  15. Pharmacology. The study of drugs is called pharmacology.
  16. Cell Biology. The study of the structure and functions of the cell is called cell biology.
Introduction to Biology

Quiz (to develop better concept) – Introduction to Biology

  1. The word “Biology: is derived from Greek word(s)
    • Bios
    • Logos
    • Both of the above
    • None of the above
  2. Biology is the _____ science
    • Physical
    • Life
    • Both of the above
    • None of the above
  3. Biology is the study of
    • Living organism
    • Non living organism
    • Non living things
    • None of the above
  4. Botany deals with
    • Plants
    • Animals
    • Both of the above
    • None of the above
  5. Zoology deals with
    • Plants
    • Animals
    • Both of the above
    • None of the above
  6. The study of the internal structure of the organisms is called
    • Morphology
    • Internal Morphology
    • Physiology
    • None of the above
  7. Which branch of biology studies the function of various organs of the organisms?
    • Morphology
    • Physiology
    • Anatomy
    • Botany
  8. Which branch of biology deals with the microscopic study of tissues of organisms?
    • Histology
    • Microbiology
    • Anatomy
    • Entomology
  9. The study of developmental stages of an organism from egg to the formation of a new organism is called
    • Entomology
    • Embryology
    • Parasitology
    • Histology
  10. The ability of the body to protect itself from foreign substances and cells inlcuding infectious microbes is called
    • Immunology
    • Immunity
    • Both
    • None

Practice Quiz (with Answers) – Introduction to Biology

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