Darwin came up with the theory of natural selection, and the idea of
survival of the fittest. In order for natural selection to occur, many things
must happen. Which of the following is NOT a requirement of natural
selection? *
O
There must be diseases and natural disasters present in an ecosystem.
O
There must be competition for food, habitats, and/or mates.
O
There must be variations and adaptations present within a species.
There must be reproductive success, and be able to produce viable offspring.

There must be diseases and natural disasters present in an ecosystem.

Explanation: The other two answers must be present for it to be natural selection.

There must be diseases and natural disasters present in an ecosystem.

Explanation: The other two answers must be present for it to be natural selection.

Explanation:

relative dating involves things like higher layers are most recent than rocks lower in the sequence. this can be extended to the known sequence of fossils. rocks containing rabbit fossils are later than those containing dinosaur fossils.  

absolute dating methods mainly use radioactive elements that have known rates of decay and produce recognizable products. for example potassium 40 decays to produce argon. once a rock has solidified the argon is trapped. by measuring the argon and potassium0 you can get an accurate number for the age.  

some other methods are good for archaeological ages. dendrochronology involves recognizing the sequence of tree rings. the orientation of magnetized particles in baked clay can be used to date a fire.

hope this .. .