Each cell of the human body has different chromosomes in its nucleus.
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Q12: When matter undergoes physical changes, the chemical
Q13: Carbon is an element, meaning that it
Q14: Which of the following is the best
Q15: A positive feedback loop causes a system
Q16: The process of peer review is important
Q18: Scientists use data to develop testable hypotheses,
Q19: A scientific hypothesis must be testable.
Q20: A chart showing all known elements arranged
Q21: The finding that objects fall to earth
Q22: A scientific law _.
A) is a hypothesis
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