What Must Occur for an Object to Be Considered a Main-Sequence

question 11

Multiple Choice

What must occur for an object to be considered a main-sequence star

• A)hydrostatic equilibrium
• B)nuclear fusion reaction in the core
• C)protostar life begins
• D)hydrostatic equilibrium and nuclear fusion reaction in the core

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Definitions:

Sclerenchyma Tissue

A type of plant tissue characterized by thick, lignified cell walls that provides support and strength to the plant structure.

Parenchyma Tissue

A type of plant tissue comprising living cells that are often soft and flexible, and primarily involved in photosynthesis, storage, and transport.

Meristematic Tissue

Plant tissue consisting of undifferentiated cells capable of continuous division, responsible for growth and regeneration.

Sclerenchyma

Cells that provide strength and support in the plant body, are often dead at maturity, and have extremely thick walls; includes fibers and sclereids.