CSEC Biology and HSB Notes

SYLLABUS REFERENCE  HSB [A4] identify selected cells which make up the human body;  [A5] explain the importance of cell specialisation in humans;  CSEC BIOLOGY  [B1.5] explain the importance of cell specialisation in multicellular organisms;  SPECIALISED VS UNSPECIALISED CELLS  Unicellular organisms are just one cell in size. These cells are said to be unspecialised or undifferentiated . In unicellular organisms, these cells are independent, carrying out all the life processes by themselves.  Multicellular organisms consist of up to trillions of cells, depending on the organism. In a multicellular organism, there are great differences between cells, even as they have the same basic structure. Each type of cell is specialised to do a specific job, such as feeding, support, communication, or defense.  A specialised cell is a cell that has been changed to carry out a specific job in a multicellular organism. Differentiation / Cell Specialisation is...

SYLLABUS REFERENCE  HSB [A2] compare the structures of an unspecialized plant and animal cell, and selected microbes [virus, bacteria, fungi] ;  [A3] state the functions of cell structures and organelles;