____ Polystyrene Is a Closed-Cell Foam That Resists Moisture Absorption

question 5

Multiple Choice

____ polystyrene is a closed-cell foam that resists moisture absorption.

• A) Extruded
• B) Expanded
• C) Rigid
• D) Molded

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Definitions:

RNA World

Hypothetical early interval when RNA served as genetic material.

Peptide Bonds

Chemical bonds formed between amino acids during protein synthesis, linking the carboxyl group of one amino acid to the amino group of another.

Protocells

Simple, self-organized, prebiotic structures that mimic living cells, thought to be key in the origin of life.

Metabolic Reactions

Chemical reactions in living organisms that are necessary for the maintenance of the living state, including processes for assembly or breakdown of substances.