In this article we will discuss about the three categories of methods in order to obtain particular kind of organism, physical, chemical and biological methods. 1. Physical Conditions for Growth: (i) Heat Treatment: This is applied in case of bacteria which form spores for example Bacillus spp. Lactobacillus spp. etc. To select the endospore-forming bacteria, a mixed culture can be [...]
In this article we will discuss about:- 1. Meaning of Plasma Membrane 2. The Fluid Mosaic Model of Plasma Membrane 3. Function. Meaning of Plasma Membrane: The plasma membrane also called cell membrane or cytoplasmic membrane is a structure internal to the cell wall. The term plasma membrane was coined by C. Nugeli and C. Cramer in 1855. However, no [...]
A famous botanist F.E. Fritsch (1935) classified algae into following 11 classes, based on pigmentation, reserve food material, flagellation and reproduction. Class 1. Chlorophyceae (= Isokontae): Generally algae are fresh water and chlorophyllous thallophytes. Chlorophyll b and carotenoides are present in chloroplasts. The cell wall is made up of cellulose and food is synthesized in the form of starch. Motile [...]