The movement of particles form regions of higher density to regions of lower density.
The diffusion of water through a semipermeable membrane.
The movement of substances across a cell membrane without the use of energy by the cell.
The movement of substances across the cell membrane that requires the cell to use energy.
The process by which a cell membrane surrounds a particle and enclose the particle in a vesicle to bring the particle into the cell.
The process in which a cell releases a particle enclosing the particle in a vesicle that then moves to the cell surface and fuses with the cell membrane.
The process by which plants, algae and some bacteria use sunlight, carbon dioxide and water to make food.
The process by which cells use oxygen to produce energy from food.
The breakdown of food without the use of oxygen.
The life cycle of a cell.
In eukaryotic cell, one of the structures in the the nucleus that are mad up of DNA and protein, in a prokaryotic cell, the main ring of DNA.
Chromosomes that have the same sequence of genes and the same structure.
In eukaryotic cells, a process of cell division that forms two new nuclei, each of which has the same number of chromosomes.
The division of the cytoplasm of a cell.