Which of the following is true of quasars? A) Quasar eruptions ...

[ENagel]

Which of the following is true of quasars?
 
  A) Quasar eruptions became less common as galaxies became more stable.
  B) Quasars did not exist until about five billion years ago.
  C) Quasars have comparatively smaller look-back time than most galaxies.
  D) Quasars eruptions were not common when galaxies were actively forming and colliding.

Question 2

Which of the following is true of active galaxies?
 
  A) They are often distorted.
  B) They do not have a black hole.
  C) They do not have an accretion disk.
  D) They are much larger than many galaxies.

[zhanghao]

Answer to Question 1

A

Answer to Question 2

A

[ENagel]

Thank you!

[zhanghao]

Always glad to help...