The Continental Drift theory states that the 7 continents were all once one big piece. Pangea broke into several pieces by convergent and divergent boundaries. The continents almost fit together as an exact puzzle.
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Answer:
Approximately 4.6 billion years ago
Explanation:
The tundra and the savanna desert
Answer:
Within a protein, multiple amino acids are linked together by peptide bonds, thereby forming a long chain.
