Batrachospermum Occurrence:- (1) Batrachospermum is fresh water alga. (2) It is found in clear, cool, and running streams. (3) Deepwater plants are dark violet or reddish in color. But the shallow-water species are olive green. (4) The intensity of light changes the color of pigments. (5) The thallus is attached to the substratum. Vegetative structure (1) The thallus of an adult plant is soft, thick, filamentous. (2) It is freely branched and gelatinous. (3) The central axis is made up of a single row of large cells. Whorls of branches of limited growth are developed on this axis. (4) These branches are filamentous and dichotomously arranged. (5) The main axis is corticated. It consists of a row of elongated cylindrical cells. (6) It is differentiated into nodes and internodes. (7) There are two types of branches that arise from the nodes: Branches of limited growth Branches of unlimited growth Batra
Chemistry in everyday life Medicines or Drugs :- The chemical substances helping of human body or an animal either from tratment of disease or to reduce suffering from pains,are called Medicines or Drugs . Chemotherpy :- The branch of science which deals with the study of tratment of disease using medicines ,is known as chemotherpy :- e.g. Cancer tratment. Classification of Medicines :- Antiseptics :- The medicines which are used to bring down the body temperature during high fever .e.g. Paracetamol,Novalgin,Quninoe,Aspirin,etc. Aspirin NOte :- Paracetamol is prefered over aspirin as an antipyretics beacause aspirine gets hydrolysed in the stomach to salicyclic acid,which causes "Ulcer" in stomach from where bleeding may take place. Paracetamol Antimalarials :- The medicines which are used to br