Nurturing Life Sciences
#Id: 10013
#Id: 7961
#XL - Q Biochemistry
#Id: 10603
#XL - R Botany
#Id: 9572
#XL - T Zoology
The Forces of Evolution
Mutation,
Genetic drift
Gene flow or migration
Selection
#Id: 8771
#Id: 7759
Some elements exist naturally as molecules. For example, hydrogen and oxygen exist as two-atom molecules.