What evidence supports the theory that elliptical galaxies come from denser clouds?
A)Elliptical galaxies are denser than spiral galaxies.
B)Elliptical galaxies are generally larger than spiral galaxies.
C)Elliptical galaxies at high redshifts lack young,blue stars.
D)Elliptical galaxies have more gas than spiral galaxies.
E)Elliptical galaxies have denser stars than spiral galaxies.

Question

Quizplus · Accepted Answer

The fact that elliptical galaxies at high redshifts lack young, blue stars suggests that they formed from denser clouds. This is because stars in denser clouds tend to form earlier, using up all of the available gas and leaving little left over for the formation of young stars later on.

Answer: E
 Elliptical galaxies have denser stars than spiral galaxies, which suggests that they formed from denser clouds. This is because stars in denser clouds tend to have more close encounters with each other, which causes them to merge and form larger, denser stars.

What Evidence Supports the Theory That Elliptical Galaxies Come from Denser