At What Point in Time Do We Say That the Protosun

question 1

Multiple Choice

At what point in time do we say that the protosun became the Sun?

• A) when thermonuclear fusion reactions began at its center
• B) when it became hot enough to emit light and heat
• C) when the temperature began to rise at its center
• D) when planetary formation was complete

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Definitions:

Flagellated Sperm

Sperm cells equipped with a flagellum, allowing for motility in fluid environments, commonly found in many plants and some animals.

Bryophytes

Non-vascular plants that include mosses, liverworts, and hornworts, characterized by their life cycles and lack of true roots and leaves.

Sporophytes

The diploid, spore-producing phase in the life cycle of plants that undergo alternation of generations.

Triploid Cell

A cell that has three sets of chromosomes, often occurring in plants and some species of fish and amphibians.