Which of the following statements represents an important contrast between background extinctions and mass extinctions?

0 votes

 

Background extinctions are caused by rapid changes in the environment, whereas mass extinctions occur primarily in response to biological competition.

Background extinctions occur only sporadically, whereas mass extinctions happen on a regular, periodic basis.

During mass extinctions, adaptations for survival and competition make little difference in the likelihood of extinction, whereas the opposite is true of background extinctions.

Mass extinctions, such as the Cretaceous-Paleogene (K-P) event, tend to take out large-bodied organisms, whereas smaller organisms tend to be removed by background extinction.

 

asked Dec 28, 2012 in Biology by anonymous
    

1 Answer

0 votes

 

During mass extinctions, adaptations for survival and competition make little difference in the likelihood of extinction, whereas the opposite is true of background extinctions.

 

answered Dec 28, 2012 by anonymous

Related questions

+2 votes
1 answer 66 views
66 views asked Dec 10, 2012 in Evolution by GeneX ~Top Expert~ (7,941 points)



...