For Which Objects in the Universe Has the Hubble Relation

question 173

Multiple Choice

For which objects in the universe has the Hubble relation been shown to hold experimentally?

• A) galaxies in the Local Group, in the near vicinity of the Milky Way
• B) stars in the Milky Way in the near neighborhood of the Sun
• C) distant galaxies
• D) stars in the distant spiral arms of the Milky Way Galaxy

---

Definitions:

Ethylene

A hydrocarbon gas (C2H4) that acts as a plant hormone, regulating a wide range of processes including fruit ripening and leaf senescence.

Jasmonic Acid

A plant hormone that plays a key role in stress responses, growth, and developmental processes, as well as in defense mechanisms against pathogens.

Prostaglandins

A group of lipid compounds that have diverse hormone-like effects in animals, including involvement in inflammation and pain management.

Cryptochrome

A class of flavoproteins that are sensitive to blue light and found in plants and animals, playing a role in the regulation of circadian rhythms.