Gamma ray bursts are ____. a. too weak to affect life on Earth ...

[karateprodigy]

Gamma ray bursts are ____.
 
  a. too weak to affect life on Earth
 b. an important influence on mutation and evolution
  c. the cause of the spectacular auroras at high latitudes
  d. triggers for solar flares and coronal mass ejections
  e. capable of causing mass extinction events

Question 2

A(n) _______________is something that is held to be obviously true and needs no further examination.
 
  Fill in the blank(s) with correct word

[amandanbreshears]

Answer to Question 1

e

Answer to Question 2

first principle