How does a scientific theory differ from a scientific law

Groups of organisms with low biotic potential, such as gray whales, that produce at most one offspring every other year a) are r-selected b) are k-selected c) are not subject to density-dependent limiting factors d) show the initial stages of the extinction process e) have escaped from the processes of natural selection and adaptation

The deserts of the sahara and australia are associated with

How does the study of genetic disorders such as pku biologists understand normal alleles?