a form of chemical bond characterized by transfer of electrons from one atom to another resulting in the attraction of oppositely charged ions a substance that dissolves in water to release a hydroxide ion (OH-) the process of nuclear division that reduces the number of chromosomes in a cell by half |
process by which organisms that are most suited to their environment survive and reproduce most successfully |
process that releases energy by breaking down food molecules in the presence of oxygen |
the method of calculating the absolute ages of rocks and minerals that contain radioactive isotopes |
energy of motion Strong supporting layer around the cell membrane in some cells |