This fossil must be younger than 475 million years old, because that is when land plants arose
A decrease in tenperature could result in birds relying more on feeders to get food.
Answer:
Genetic variations that alter gene activity or protein function can introduce different traits in an organism. If a trait is advantageous and helps the individual survive and reproduce, the genetic variation is more likely to be passed to the next generation (a process known as natural selection).
Explanation:
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