Help me in question 4 please
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Biology, 21.06.2019 17:30, foreverisabel
Which of the following systems in absorbing oxygen and releases carbon dioxide
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Which statements explains what the fossil records indicates? check all that apply. a) earth is 4.5 billion years old b) many organisms have become extinct c) mammals have always existed on earth d) mass extinctions have occurred several times on earth e) the amount of water on earth has decreased over time?
Answers: 2
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