The cell membrane is very important to the cell structure. It helps hold everything within the cell and serves as a protective covering as well.
When the surface water is heated by the sun it dissolves more salt i believe
Answer:
Prophase; when the nuclear envelope breaks down,
prometaphase; the physical barrier that encloses the nucleus, called the nuclear envelope, breaks down
metaphase; The chromosomes line up across the center of the cell
anaphase; The centromeres split
telophase; The chromosomes begin to stretch out and lose their rod-like appearance
There are lots:
Biology and Medicine - cloning and expression of human insulin in bacteria (stopped having to produce it from pig pancreases); Watson & Crick discovery of the structure of DNA; gene therapy in humans
Chemistry - determination of the exact number of molecules in a mole (Avagadro's number); discovery of radioactivity (Rutherford); the invention of nylon (DuPont); Boyle's law (behavior of gases)
