Biology

Introduction: 

Biology is a study of living things. like physics, chemistry it is also branch of science. in bio the biologists study about living things as well as non-living things which affect the living thing in any way. the literal meaning og biology is "study of life". 

Property Of Living Organisms:

Living organisms have following properties:

1:They are complex things and highly organized.

2:They are composed of one or many cells.

3:They contain genetic program of their characteristic.

4:They acquire and use energy.

5:They grow in size.

6:They carry out and control numerous chemical reactions e.g Respiration and photosynthesis.

7:They can maintain a fairly constant internal environment e.g Homeostasis.

8:They can produce offspring similar to themselves e.g Reproduction.

9:They can respond to changes in their environment e.g Neurons.

Any thing containing all these properties,
simultaneously can be declared as living thing.