GASEOUS EXCHANGE AND RESPIRATION SARAWEFriday, September 18, 2020Gaseous exchange Gaseous exchange is the movement of oxygen and carbon dioxide across a respiratory surface. Unicellular organisms carry ou...Read More
TRANSPORTATION OF LIVING MATERIALS -2 SARAWEFriday, September 18, 2020TRANSPORT IN PLANT Introduction: The transport system in plants is not as complex as that of animals. Materials are transported by vascu...Read More