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Biology, 19.08.2019 01:30 rachelkim999
Which of the following can be considered fossils?
a. a 1 billion year-old rock.
b. a 1 billion year-old piece of amber.
c. a 1 billion year-old piece of amber with a primitive insect inside.
d. all of the above
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Biology, 23.06.2019 06:00, victoria6929
Which of the following is the best definition for a system? a. something that takes up space and has mass b. the form and arrangement of an object c. the collection of organs d. a group of connected or related things
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Which of the following can be considered fossils?
a. a 1 billion year-old rock.
b. a 1...
a. a 1 billion year-old rock.
b. a 1...
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