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Biology · Chapter 1: Introduction to Biology
Relationship of Biology with Other Sciences
How biology links with physics, chemistry, mathematics, geography, economics and computer science to form biophysics, biochemistry, biostatistics, biogeography, bioeconomics and bioinformatics.
Key termRememberExampleWatch out
01Concept
Living things are made of the same atoms and follow the same laws of nature as everything else. So, to understand life fully, biologists also use physics, chemistry, mathematics and other subjects. When biology joins another subject, a new combined field is formed, often starting with bio-.
| Combined field | Biology + … | What it studies | Example |
|---|---|---|---|
| Biophysics | Physics | Laws of physics applied to living things | Bones and muscles of the arm work like a lever; the eye focuses light like a lens |
| Biochemistry | Chemistry | Chemicals and chemical reactions inside living things | How enzymes digest food; how glucose releases energy |
| Biomathematics (Biostatistics) | Mathematics | Using maths and statistics to study biological data | Finding the average height of wheat plants; tracking how fast a disease spreads |
| Biogeography | Geography | Where organisms live on Earth, and why | Why the markhor lives in mountains, but the camel lives in deserts |
| Bioeconomics | Economics | Costs and benefits of using living resources | Working out whether a fish farm will make a profit |
| Bioinformatics | Computer Science | Storing and analysing biological data with computers | Comparing the DNA of two virus samples |
Biology is also linked to engineering. Biomedical engineers design artificial limbs, heart valves and hospital machines.
02Real World Examples
X-rays and ultrasound
Hospitals use X-rays and ultrasound, both based on physics, to see inside the body without surgery.
Blood tests
A blood sugar test for diabetes is biochemistry: it measures the amount of glucose in the blood.
Tracking diseases
Health departments use statistics to track the number of dengue or malaria cases and plan where to spray against mosquitoes.
DNA databases
Scientists use computers to store and compare DNA from thousands of organisms, for example to identify a new virus.
03Practice Questions
Try to answer in your own words first, then open the model answer.
Short questions
Q1.Why does biology need help from other sciences?Show answer
Answer
Living things are made of atoms and chemicals and obey the laws of physics. To understand them fully, biologists use ideas and tools from physics, chemistry, mathematics and other subjects.
Q2.Define biophysics and biochemistry, with one example of each.Show answer
Answer
- Biophysics: the study of living things using the laws of physics. The arm works as a lever.
- Biochemistry: the study of chemicals and chemical reactions in living things. Enzymes digest food.
Q3.What is biogeography? Give an example.Show answer
Answer
Biogeography is the study of where organisms live on Earth, and why.
Example: the markhor lives in high mountains, while the camel is suited to hot deserts.
Q4.How is computer science helpful in biology?Show answer
Answer
Through bioinformatics, computers are used to store and analyse large amounts of biological data, such as DNA sequences. This helps scientists compare organisms and identify diseases quickly.
Long questions
Q5.Explain the relationship of biology with physics, chemistry, mathematics, geography, economics and computer science.Show answer
Answer
- Physics → Biophysics: physical laws explain movement, vision and hearing. Bones work as levers.
- Chemistry → Biochemistry: chemical reactions explain digestion and respiration. Glucose releases energy.
- Mathematics → Biomathematics / Biostatistics: maths is used to analyse data. Average crop yield.
- Geography → Biogeography: explains where organisms live. Markhor in mountains.
- Economics → Bioeconomics: costs and profits of living resources. A fish farm's profit.
- Computer Science → Bioinformatics: storing and comparing data. Comparing DNA.
Conclusion: biology is connected to all other sciences, and each link has created a new field of study.