They can be preserved within the fossils of organisms that carry them. They provide clues about the types of plants that grew in a region at a particular time.
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Answer:
First is heat waves, second is drought and lastly is monsoons
Explanation:
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Answer:
A substitution is a mutation that exchanges one base for another (i.e., a change in a single "chemical letter" such as switching an A to a G). Such a substitution could: change a codon to one that encodes a different amino acid and cause a small change in the protein produced.
Physical and function unit
