BIOLOGY

                                                       WHAT IS EVOLUTION Evolution is a slow and continuous process by a similar life from are converted into complex form

* Cell division is a process by which new cell are originated from pre existing cell. * cell division is divide into two types.       (1) Mitosis       (2) Meosis

* It is an important group of thalophyta. * The word thalophyta is coming derive from 2 Greek word thalous means sprout and phylum means plant. * The term alge is coming from Latin word which means seaweds. The term alge introduced by linaus in 1753. * The plant body of alge differentiated into leaf stem and root. * The plant body is thalus like structure. * The plant body may be unicellular or multicellular. *Almost all the alge aquatic in nature. * They contains chlrophill pigment. * The sex organ is unicellular and non jacketed. * Water is not needed for fertilization. * No embryo formation takes place. * They autotrophic mode of neutration. *Eg- Nostoc, volvox,ectocatcus etc 

* viruces are submicroscopic organism. * They are less than 200mm. * They have no protoplasm. * They can pass through bacterial filter. * They are obligate particle. * They have no norvous system and respiratory system.

                                                                          CELL Cell is the structural and functional unit of living organisim Each cell is indipendent in performing all necessery process of life . The cell was discovered by robert hoek in1665 under light microscope. the term cell is derived from a latin word "cella" which means hollow cavity. Leuenhoek in 1674 observed free cells with an improve microscope.

                                                                 CYTOLOGY * It is the branch of biology which deals with study structure and function of cell. * the term cytology was derived from two greek word kytos and logous kytos means cells and logous means to study

Biology is comes from two Greek word bios means living organism and logous means to studystudy