Why Do the H-R Diagrams of Young Clusters Show the Least

question 18

Multiple Choice

Why do the H-R diagrams of young clusters show the least massive stars located above the zero-age main sequence?

• A)They are always the first stars to form in a cluster
• B)They take longer to reach the main sequence
• C)They evolve away from the main sequence before more massive stars do
• D)They are actually binaries,and thus seem overluminous

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Definitions:

Norepinephrine

A neurotransmitter and hormone that plays a key role in alertness and the fight-or-flight response, also involved in mood regulation.

Serotonin

A neurotransmitter found in the brain that affects mood, appetite, sleep, memory, and learning, often associated with feelings of well-being and happiness.

Antipsychotics

Medications used to manage and treat symptoms of psychotic disorders, such as schizophrenia and bipolar disorder.

Risperdal

A brand name for risperidone, a medication primarily used to treat schizophrenia and bipolar disorder.