What Is Not a Main Source of Evidence for the Existence

question 34

Multiple Choice

What is not a main source of evidence for the existence of dark matter?

• A)massive blue stars
• B)rotation curves of disk galaxies
• C)stellar motions in elliptical galaxies
• D)velocities and positions of galaxies in clusters of galaxies
• E)gravitational lensing by clusters of galaxies

---

Definitions:

Gram-positive

Refers to bacteria that retain the crystal violet dye used in the Gram stain process, indicating a thicker peptidoglycan layer in the cell wall.

Chemical Test Strip

Chemical test strips are small pieces of paper or material that change color when exposed to certain chemical compounds, used for testing and measuring the presence or concentration of specific substances.

"QNS"

Stands for "Quantity Not Sufficient", indicating that a sample size is inadequate for testing or analysis.