The Very First Earth Atmosphere,forming with Earth Itself,was Probably Dominated

question 35

Multiple Choice

The very first Earth atmosphere,forming with Earth itself,was probably dominated by the cosmically abundant gases ________ and ________.

• A)nitrogen;oxygen
• B)hydrogen;helium
• C)carbon dioxide;methane
• D)water vapor;sulfur dioxide

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Definitions:

Stinging Cells

Specialized cells found in certain animals like jellyfish that can inject a toxin into predators or prey.

Skeletal Material

The substance that forms the supportive framework of an organism, including bone and cartilage in humans.

Fluke-Platyhelminthes

A class of parasitic flatworms within the Phylum Platyhelminthes, including liver flukes and blood flukes, affecting various hosts.

Calcium Crystals

Mineral deposits found in various tissues of the body, often in bones and teeth, contributing to their hardness.