How Do We Know That AGNs Have Sizes on the Order

question 26

Multiple Choice

How do we know that AGNs have sizes on the order of our Solar System?

• A) Quasars and Seyfert galaxies are stellar-like sources.
• B) Their brightness varies by factors of a few.
• C) The emission lines in their spectra show gas rotating at speeds of thousands of km/s.
• D) Their brightness varies on timescales ranging from hours to a day.
• E) We can measure their angular size, which gives us the physical size when we know the distance.

Distinguish between different reproductive strategies (oviparous, viviparous, and neotenic) in vertebrates.

Understand the impact of environmental changes and human activities on vertebrate diversity and survival.

Recognize the phylogenetic relationships among vertebrates and the evidence supporting these relationships.

Grasp the importance of structural and molecular evidence in understanding vertebrate evolution.

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Definitions:

Rational Brainstorming

A method of idea generation focusing on logical and structured approaches to solve problems or generate new concepts.

Lateral Thinking Technique

A problem-solving approach that involves looking at situations or challenges from a new and unconventional perspective, often leading to creative solutions.

Cross-Fertilization

The sharing or exchange of ideas, knowledge, or innovation across different disciplines, organizations, or cultures, leading to new insights or developments.

Satisficing

A decision-making strategy that aims for a satisfactory or acceptable outcome, rather than the optimal solution.