Why will individuals have brown eyes rather than a blue eyes?

Which statements are true of a scientific theory but not a hypothesis

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

Which of the following is an eon in the time scale? phanerozoic proterozoic archean all of the above