Suppose You Found a Gas Cloud,the Atoms of Which Had

question 30

Multiple Choice

Suppose you found a gas cloud,the atoms of which had never been part of a star.What would you expect its composition to be?

• A)100% hydrogen
• B)75% hydrogen and 25% helium
• C)70% hydrogen, 25% helium, and 5% other elements (carbon, oxygen, etc.)
• D)50% hydrogen and 50% helium

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Definitions:

Limbic System

A complex system of nerves and networks in the brain, involved in emotions and drives, as well as forming memories.

Chromosomes

Long strands of DNA housed in the nucleus of a cell, which carry genes and function in the transmission of genetic information.

Ribosomes

Cellular structures responsible for protein synthesis in living organisms.

Nucleotides

Organic molecules that serve as the building blocks of nucleic acids, like DNA and RNA, each composed of a base, a sugar, and a phosphate group.