Essentially All the Elements Heavier Than Iron in Our Milky

question 23

Multiple Choice

Essentially all the elements heavier than iron in our Milky Way were formed:

• A) by supernovae
• B) during the formation of black holes
• C) by fusion in the cores of the most massive main-sequence stars
• D) during the formation of planetary nebulae
• E) during the initial stages of the Big Bang

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Definitions:

Amino Acids

Organic compounds that are the building blocks of proteins, necessary for health and vital processes in living organisms.

Fluid-filled Sacs

Structures in organisms, such as bursae or cysts, containing liquid within a membranous enclosure, serving various physiological functions.

Double-Membrane Organelles

Cellular components surrounded by two lipid bilayers, including the nucleus, mitochondria, and chloroplasts in plants, playing various roles in cellular functioning.

Photosynthesis

The method through which green plants and certain organisms utilize sunlight to produce nutrients from carbon dioxide and water, releasing oxygen as a secondary product.