Biology,the word comes from Greek bios meaning life And logoes meaning throught or science of can be definite as the study of various aspect of living beings ( plant and animals ) . Biology is the study of life from the simplest forms of plant and animals (includintg one –cell animal aa7 algae) to highly complex structure of the human being . it include the study of how organism are saturated and how they are function and relate to each other .
Biology is called as Life science as it make to understand how living thing perform their life activities and interact with the living and non-living thing.
Branches : Botany, Zoology & Microbiology.
Why Study of Biology
To help us understand ourselves better . It explain the basic concept like strcture & function of cell.
To help us meet our need by utilising the source available. The knowledge of medicine, surgery , crop rotation , Animal husbundary help us to curediseases & improve the quality of plant & Animals.
To acquaint us with the fundamentals nutrition, health & population control. to have a scientific approach while solving problems.
To help us overcome the superstitions & to remove the baises of sex , race & colour.
To enable us to enjoy nature .
Science of Exception
DNA is hereditary material in all living organism except in some plant Viruses such as Tobacco mosaic virus where RNA is the hereditary material
RNA is usevally single srand but in Rheovirus it is double stranded.
DNA is normally double sranded except in some viruses in which it is single stranded .
All living cell have Nucleus except Red Blood cell ( RBC ) of mammals.
Introduction To College