How do observations of distant galaxies help us learn about galaxy evolution?
A) Observations at different distances show galaxies of different ages and therefore different stages of evolution.
B) We can observe the birth of galaxies.
C) We can observe the evolution of a single galaxy over time.
D) We can observe two galaxies merging and what the result is, helping us learn how mergers affect evolution.
E) We can see what our galaxy used to look like and therefore theorize about the physical processes that led to its current appearance.
Question 2
The lobes of a radio galaxy can be as much as
A) dozens of light-years from the galaxy's nucleus.
B) hundreds of light-years from the galaxy's nucleus.
C) thousands of light-years from the galaxy's nucleus.
D) millions of light-years from the galaxy's nucleus.
E) billions of light-years from the galaxy's nucleus.
Hypothetical stages in the evolution of seeds.
Convergent evolution in body forms
The Rotation Curves of Four Spiral Galaxies
Creation of Spiral and Elliptical Galaxies
Hominin Evolution in the Mid to Late Pleistocene
evolution tree