Mutations are the source of all new alleles. An allele is a variant form of a gene. Variations in alleles lead to variations in organisms. Positive mutations give an organism a better chance of survival. It means that the mutation may be passed on to the offspring. Negative mutations may lead to an early death.<span> Therefore, changes in alleles from one generation to another form the basis of evolution.</span>
Answer:
Most of us probably have seen meteors or shooting stars. A meteor is the flash of light that we see in the night sky when a small chunk of interplanetary debris burns up as it passes through our atmosphere. ... If any part of a meteoroid survives the fall through the atmosphere and lands on Earth, it is called a meteorite.(hubblesite)
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Answer:
each person chooses one
Explanation:
each family for example will go on to choose one another
The beginning of spring in the Northern Hemisphere is marked by the Vernal (spring) equinox. I hope this helps!