The movement of particles from an area of high concentration to an area of low concentration.
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 encloses the particle in a vesicle to bring the particle into the cell.
The process by which a cell releases a particle by enclosing the particle in a vesicle that then moves to the cell surface and fuses with the cell membrane.
The life cycle of a cell.
In a eukaryotic cell, one of the stuctures in the nucleus that are made of DNA. 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.
Cells grow to adult size and makes copy of DNA and prepares to divide.
Chromatin material condenses, spindle fibers form, nuclear membrane dissolves.
Chromosomes line up at cell center, attach to spindle fibers.
Centromeres split chromatids, move to opposite ends of cell, cytoplasm starts division.
Chromosomes stretch out, new nuclear membrane forms.
Two daughter cells are formed.
Prophase, Metaphase, Anaphase, Telophase.