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Ben is interested in using a source that provides original research, current and developing trends and experts within specific fields. which source should he use?

Scientists observed a rock stratum with fossil. if mollusks evolved before arthropod, where will their fossils be found.

Abacterium was found to contain a sequence of atcgggatcct in its genome. a few generations later, the sequence was found to be atcatcct. what type of mutation caused this change in the bacteria? a. duplication b. insertion c. inversion d. translocation