Biology is the study of living organisms and how they function, grow, and interact. Here are the core concepts explained in a simple way:
1. Cell Theory
All living things are made of cells. A cell is the smallest unit of life. Some organisms have one cell (like bacteria), while others have many (like humans).
2. Structure and Function
Every part of a living organism has a specific job. For example, the heart pumps blood, and leaves make food for plants.
3. Metabolism
This includes all chemical reactions in the body that keep an organism alive, such as breaking down food for energy and building new molecules.
4. Homeostasis
Living organisms maintain a stable internal environment. For example, humans regulate body temperature even when its hot or cold outside.
5. Growth and Development
All organisms grow and develop according to specific instructions coded in their DNA.
6. Reproduction
Living things can reproduce to make new organisms, either sexually or asexually.
7. Genetics and Heredity
Traits are passed from parents to offspring through genes, which are made of DNA.
8. Evolution
Over time, species change and adapt to their environment. This happens through natural selection.
9. Ecology
This studies how organisms interact with each other and with their environment, including ecosystems and food chains.
10. Energy Flow
Energy moves through living systems, usually starting from the sun, then to plants, and then to animals.
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