The drastic reindeer population changes on St. Matthew Island ...

[cmoore54]

The drastic reindeer population changes on St. Matthew Island appears to have ultimately been caused by
 
  A) the absence of any predators.
  B) the addition of a keystone species.
  C) the narrow reliance of reindeer on just a single food species.
  D) the introduction of grizzly bears to the island in 1962.

Question 2

About how much of the sun's radiation would strike the Earth if the Earth did not have its atmosphere?
 
  A) About 10 times more
  B) About twice as much
  C) About the same amount
  D) About half as much

[Kedrick2014]

Answer to Question 1

A

Answer to Question 2

B

[cmoore54]

Thanks for the timely response, appreciate it

[yeungji]

TYSM