What Was the First Evidence That Quasars Were Different from Astronomical

question 20

Multiple Choice

What was the first evidence that quasars were different from astronomical objects before they were observed in visual wavelengths

• A)The first quasars were seen to have fuzz.
• B)Quasars emitted radio energy like active galaxies, but appeared to be point sources in radio wavelengths.
• C)Quasars showed significant gravitational lens effects.
• D)The spectra of quasars looked like that of an M dwarf.
• E)The larger redshifts originally indicated that they were orbiting the center of the Milky Way.

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Definitions:

Probe

Short fragment of DNA labeled with a tracer; designed to hybridize with a nucleotide sequence of interest.

Polymerase Chain Reaction (PCR)

Laboratory method that rapidly generates many copies of a specific section of DNA.

DNA Sequencing

The process of determining the precise order of nucleotides within a DNA molecule, critical for genetic research and diagnostics.

Agricultural Application

The use of practices, tools, and technologies in the cultivation of crops and raising of livestock to improve efficiency, productivity, and sustainability in agriculture.