Biology is a branch of science that investigates life. It studies all forms of life from a microscopic cell to the massive rain forest.
Bio means “life”.
logy means “study of”.
Biology studies living things.
What is a living being?
Living beings have the following characteristics.
All living things
- Grow: They grow by changing shape, size etc.
- Need nutrition: They need fuel to power their growth.
- Respire: They convert fuel/ food into useful energy.
- Excrete: They also send out waste materials.
- Respond: They have senses and respond to their surrounding.
- Move: They move in response to changes in their environment.
- Reproduce: They make more of their own to sustain their species.
Some of the different fields of biology are
This involves studying how each body part works.
Physiologists will study anatomy, as well as fossils of extinct animals to understand about the life of extinct animals.
This involves studying how large communities of organisms co-exist.
Ecologists study the relationships between individuals in the large ecosystem.
This involves studying how living things adapt to changes in their surroundings.
Evolution is a slow process and study of fossils helps evolutionists find common features that exist in extinct and living species.
This study involves how nature is being affected by human activities.
Conservationists use this knowledge to stop or slow down the extinction of various species.
This involves studying the smallest unit of any living being – the cell.
Microbiologists use tools like the microscope to look into cells to learn how the parts of the cell function.
This branch of science groups living things into groups based on characteristics.
The groups are called taxons and are hierarchical
Hierarchy of living things: Domain > Kingdom > Phylum/ division (plants) > Class > Order > Family > Genus > Species
Examples of domains: Bacteria, Eukaryota and Archaea. Animals and plants come under the domain Eukaryota. This is the largest domain and the only one that is subdivided into kingdoms.