IGCSE Biology

Investigate and describe the effects on plant tissues of immersing them in solutions of different concentrations

State that water moves into and out of cells by osmosis through the cell membrane

State that water diffuses through partially permeable membranes by osmosis

Describe the importance of diffusion of gases and solutes in living organisms

State that some substances move into and out of cells by diffusion through the cell membrane

State that the energy for diffusion comes from the kinetic energy of random movement of molecules and ions

Describe diffusion as the net movement of particles from a region of their higher concentration to a region of their lower concentration (i.e. down a concentration gradient), as a result of their random movement

Calculate magnification and size of biological specimens using millimetres as units

State and use the formula: magnification = image size ÷ actual size

Describe the meaning of the terms: cell, tissue, organ, organ system and organism as illustrated by examples given in the syllabus