Students guide - by Manoj Verma

                                 Unit :- 17      Cell and tissues Cell : - The structural and functional unit of life is called cell. Or Basic unit of living being is called cell . Tissues : - A group of cell which is similar in structure and function is called tissue .for example : Bone ,blood , muscle, etc are the animal tissues ,and  xylem and phloem etc. are the example of plant tissues . They are two types :  A)Animal tissues B) Plant tissues   A) Animal tissue : A group cell animal cells having the same origin ,structure and function is called animal tissue .   Types of Animal Tissue :-They are 4 types 1.)Epithelial Tissue The animal  tissue which   cover and inner lining of the body surface, organs ,duct, blood vessels is known as epithelial tissue.   Characteristics of Epithelial Tissue Following are the important characteristics of epithelial tissues: 1.      The of cell of these tissue are  a single-layered or multi-layered. 2.      The tissues have the po

                                        Unit :-16       Living being Micro-Organism : The organism that are seen only through a microscope are called micro-organisms or microbes .The micro –organisms that are harmful and causes of diseases are called Pathogens (Patho=diseases ,gnes =causing) Microbiology : The branch of biology consisting the study of micro-organism is called microbiology . Classification of micro-organism :Micro- organism are divides into 5 majors groups : 1)Virus      2)Bacteria    3)Protozoa   4)Fungi            5)Algae 1)Virus : A microscopic obligatory parasite that causes of various disease in plants and animals is called virus . The branch of biology consisting the study of viruses is called virology .Viruses can exist outside of the living cell for long period of time but they can reproduces only inside the specific cell of living host so viruses are   called   obligatory parasite .Virus show the properties of both living being and non living bei