Why Do We Think the First Generation of Stars Would

question 24

Multiple Choice

Why do we think the first generation of stars would be different from stars born today?

• A)Without heavy elements,the clouds could not reach as low a temperature as today and had to be more massive to collapse.
• B)Without heavy elements,the nuclear reactions at the center of the stars would be very different.
• C)Without heavy elements,there was no dust in the clouds and they collapsed faster.
• D)The Universe was much denser when the first stars were born.
• E)There were no galaxies when the first stars were born.

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Definitions:

Evolution By Natural Selection

A fundamental mechanism of evolution, proposed by Charles Darwin, where individuals with traits better suited to their environment tend to survive and reproduce, leading to changes in the population over time.

Variation

The differences observed within and among populations in genetically inherited characteristics, essential for natural selection and evolution.

Heritability

The proportion of observed variation in a particular trait among individuals of a population that can be attributed to inherited genetic factors.

Medium Ground Finch

A species of bird in the Galapagos Islands, known for its variable beak size, studied in the context of natural selection.