BIO101 – General Biology: Complete Study Guide with
Revision Questions and Answers
© Lesuyai Organic Guides
Topic 1: Introduction to Biology
1.1 Definition and Scope of Biology
Biology is the scientific study of living organisms — their structures, functions, growth,
origins, evolution, and distribution. The term is derived from two Greek words: bios (life)
and logos (study). It seeks to understand how life functions at different levels — molecular,
cellular, organismal, population, and ecosystem.
Scope of Biology includes:
- Morphology: Study of structure and form of living organisms.
- Physiology: Study of biological functions and mechanisms.
- Genetics: Study of heredity and variation.
- Ecology: Study of organisms in relation to their environment.
- Evolution: Study of changes in species over time.
1.2 Importance of Studying Biology
Biology plays a crucial role in various sectors of human life:
- Health and Medicine: Understanding diseases, producing vaccines, and developing
drugs.
- Agriculture: Improving crop yield and resistance through genetics and biotechnology.
- Environmental Conservation: Maintaining biodiversity and ecological balance.
- Industry: Application of microbiology in fermentation, waste management, and
bioengineering.
- Education and Research: Forming the foundation for scientific literacy and
problem-solving.
1.3 Characteristics of Living Things
All living things share certain fundamental characteristics:
1. Organization
2. Nutrition
3. Respiration
4. Growth
5. Reproduction
6. Excretion
7. Response to Stimuli
8. Movement
9. Adaptation
1.4 Branches of Biology
Revision Questions and Answers
© Lesuyai Organic Guides
Topic 1: Introduction to Biology
1.1 Definition and Scope of Biology
Biology is the scientific study of living organisms — their structures, functions, growth,
origins, evolution, and distribution. The term is derived from two Greek words: bios (life)
and logos (study). It seeks to understand how life functions at different levels — molecular,
cellular, organismal, population, and ecosystem.
Scope of Biology includes:
- Morphology: Study of structure and form of living organisms.
- Physiology: Study of biological functions and mechanisms.
- Genetics: Study of heredity and variation.
- Ecology: Study of organisms in relation to their environment.
- Evolution: Study of changes in species over time.
1.2 Importance of Studying Biology
Biology plays a crucial role in various sectors of human life:
- Health and Medicine: Understanding diseases, producing vaccines, and developing
drugs.
- Agriculture: Improving crop yield and resistance through genetics and biotechnology.
- Environmental Conservation: Maintaining biodiversity and ecological balance.
- Industry: Application of microbiology in fermentation, waste management, and
bioengineering.
- Education and Research: Forming the foundation for scientific literacy and
problem-solving.
1.3 Characteristics of Living Things
All living things share certain fundamental characteristics:
1. Organization
2. Nutrition
3. Respiration
4. Growth
5. Reproduction
6. Excretion
7. Response to Stimuli
8. Movement
9. Adaptation
1.4 Branches of Biology
