Primary succession occurs in areas without life, while secondary succession occurs in places that were previously inhabitated.
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Answer:
Explanation:
The fossil record
This supports Darwin's theory of evolution, which states that simple life forms gradually evolved into more complex ones. Evidence for early forms of life comes from fossils. By studying fossils, scientists can learn how much (or how little) organisms have changed as life developed on Earth.
Collagen is a substance that is made up of amino acid linked together to form long, branched polypetide (tertiary protein chains). Thus COLLAGEN is the protein.
Water intake is essential in the prevention of heat related injuries
