Which of These Variable Stars Would Be Classified as a Cepheid

question 42

Multiple Choice

Which of these variable stars would be classified as a Cepheid?

• A) an F giant with a period of 14 years
• B) a G giant with a period of 14 hours
• C) an M supergiant with a period of 140 days
• D) a B supergiant with a period of 0.14 days
• E) a K giant with a period of 14 days

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Definitions:

Storage Root

A root modified for the storage of nutrients and energy, typically in the form of carbohydrates, as seen in carrots and beets.

Photosynthetic Root

Roots capable of photosynthesis, typically found in some aquatic plants, allowing them to absorb carbon dioxide directly from their environment.

Arbuscule

A specialized tree-like structure formed within the cells of plant roots by certain types of fungi in a symbiotic mycorrhizal relationship.

Mycorrhizal Fungus

A type of fungus that forms a symbiotic relationship with the roots of a plant, exchanging nutrients and water in a way that benefits both organisms.