WEEK 1 TASK

 

 

 

cell membrane

 

 

 

The cell membrane or plasma membrane is a biological membrane that separates the interior of all cells from the outside environment. The cell membrane is selectively permeable to ions and organic molecules and controls the movement of substances in and out of cells. It basically protects the cell from outside forces. It consists of the lipid bilayer with embedded proteins. 

Reference: http://en.wikipedia.org/wiki/Cell_membrane

Crystal growth involves a variety of research fields ranging from surface physics, crystallography, and material sciences to condenser mater physics. 

 

 

 Reference: http://www.pnas.org/content/96/20/11069.full accessed 20/03/2012

 

Tree branches are woody structural member connected to but not part of the central trunk of a tree (or sometimes a shrub). Large branches are known as boughs and small branches are known as twigs. 

The branches can be horizontal, vertical, or diagonal, the majority of trees have upwardly diagonal branches.

 Reference: http://en.wikipedia.org/wiki/Branch accessed 20/02/2012