How Long After the Big Bang Did Nucleosynthesis,the Combining of Protons

question 48

Multiple Choice

How long after the Big Bang did nucleosynthesis,the combining of protons and neutrons together to form nuclei,begin to occur?

• A) 10^-2 seconds
• B) 3 minutes
• C) 5000 years
• D) 10⁹ years

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Definitions:

Conducting Zone

Part of the respiratory system comprised of the airways that carry air to the sites of gas exchange but are not directly involved in gas exchange.

Simple Squamous Epithelium

A single layer of flat cells that forms the lining of blood vessels, air sacs of lungs, and other surfaces where passive diffusion of gases occurs.

Pseudostratified Epithelium

A type of epithelial tissue that appears layered due to the varying lengths of cells but is actually a single layer where every cell is in contact with the basement membrane.

Hyaline Cartilage

A type of strong, flexible connective tissue found in areas such as the joints, rib cage, and respiratory tract.