In any population, members have slight differences among them, whether in height, eyesight acuity, beak shape, rate of egg production, or other traits that may affect survival and reproduction. If a trait has a genetic basis, it can be passed on to offspring helping the terms of natural selection.
ANSWER:
chromosomes
Explaination:
Chromosome are made of protein and a single molecule of acid DNA. It's passed on from parental offspring's.
However, the brightness of a star depends on its composition and how far it is from the planet. Astronomers define star brightness in terms of apparent magnitude — how bright the star appears from Earth — and absolute magnitude — how bright the star appears at a standard distance of 32.6 light-years, or 10 parsecs.
Answer:
a mineral is scraped or rubbed hardly on sandpaper or unglazed porcelain
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