Why Is the Strategy of Searches for Extraterrestrial Life Usually

question 28

Multiple Choice

Why is the strategy of searches for extraterrestrial life usually based on carbon chemistry?

• A) Carbon dioxide is the main ingredient of planetary atmospheres, both terrestrial and Jovian.
• B) No other atom can combine easily with the abundant hydrogen and helium to form long molecules in interstellar gas.
• C) Most meteorites that reach Earth are composed of carbon.
• D) Carbon is abundant and is versatile in forming complex, long-chain molecules.

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Definitions:

Diphenhydramine

An antihistamine drug used to relieve allergic reactions, treat insomnia, and alleviate symptoms of the common cold.

Side Effect

An unintended and usually adverse effect of a drug or therapy that occurs in addition to the desired therapeutic effect.

Demerol

A brand name for meperidine, a narcotic analgesic used to treat moderate to severe pain.

Morphine IV

Intravenous administration of morphine, a powerful opiate used for severe pain management.