Welcome everyone in the first episode of this podcast we are going to understand the key concepts of the first part of IB biology which are:

• According to the cell theory, living organisms are composed of cells


• Organisms consisting of only one cell carry out all the functions of life in that cell


• Surface area to volume ratio is important in the limitation of cell size


• Multicellular organisms have properties that emerge from the interaction of their cellular components


• Specialized tissues can develop by cell differentiation in multicellular organisms