Answer: The most massive stars, with eight times the mass of the sun or more, will never become white dwarfs. Instead, at the end of their lives, they will explode in a violent supernova, leaving behind a neutron star or black hole. ... Low- to medium-mass stars, such as the sun, will eventually swell up into red giants.
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Volcanic eruptions are more predictable
Both volcanic eruptions and earthquakes are measured by seismographs but volcanic eruptions are easier to notice because of where tectonic plates move(hotspots). If their is an opening between plates over a hotspot a volcano can form and eventually erupt.
Fitness is a measure of reproduction success (how many offspring an organism leaves in the next generation, relative to others in the group). Natural selection can act on traits determined by alternative alleles of a single gene, or on polygenic traits( traits determined by many genes).
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