Interactions among galaxies also are thought to influence a ...

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Interactions among galaxies also are thought to influence a galaxy's type in at least some cases. Which of the following does not support the idea that interactions can shape galaxies?
 
  A) the presence of features, such as tails extending out of galaxies, bridges between galaxies, and rings of stars around galaxies
  B) the fact that galaxies with distorted appearances are more common at great distances than nearby
  C) computer modeling of collisions between galaxies
  D) the fact that more distant galaxies have larger redshifts

Question 2

With a Hubble constant of 70 km/sec/Mpc, the critical density would be
 
  A) 6.23  10-23 g/mole.
  B) 3  10-31 g/cc.
  C) 1.4 g/cc.
  D) 4  10-36 g/cc.
  E) 9  10-27 kg/m3.

[strudel15]

Answer to Question 1

D

Answer to Question 2

E

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