Which statements describe constellations? Check all that apply. Constellations are the brightest stars found in a pattern.
Constellations can be used for navigational purposes.
Constellations can be found only in the Southern Hemisphere.
Constellations are named patterns of stars seen in the night sky.
Constellations are used by astronomers to locate objects in the night sky.

The correct answers are B. Constellations can be used for navigational purposes, D. Constellations are used by astronomers to locate objects in the night sky., and E. Constellations are used by astronomers to locate objects in the night sky.

Explanation:

In astronomy, the term "constellation" refers to a group of stars that together form a specific imaginary pattern. Over time, these patterns have been identified and named; as a result of this, nowadays there are 88 constellations, this includes constellations such as Orion or Aquarius. Moreover, constellations serve for multiple purposes, because for centuries they have been used by navigators, for example by locating the constellation Ursa Minor navigator could locate Polaris that indicates the Northern pole. Besides this, it has allowed astronomers to locate objects such as planets. According to this, constellations are named patterns of stars used for navigational and astronomical purposes.

during the process of dna replication, brdu can replace thymidine and incorporate into the newly synthesized dna, cell proliferation thus can be reflected in the extent of brdu incorporation.