Due to the galaxy density and collisions, ________ are rare in the centers of clusters.
A)irregulars
B)quasars
C)spirals
D)black holes
E)blazars

Question

Quizplus · Accepted Answer

Spirals are more commonly found in the outer regions of galaxy clusters where they are not subject to as much gravitational interaction and collisions. The dense and violent environment of the cluster center is more conducive to the formation of elliptical galaxies. Quasars and blazars are types of active galactic nuclei that are not restricted to any specific region of a galaxy cluster. Black holes may be present in the center of a cluster but their presence is not related to the rarity of certain types of galaxies. Irregular galaxies can be found throughout a cluster, including in the center.

Due to the Galaxy Density and Collisions, ________ Are Rare