In the deformed mice, somatic cells but not germ cells were mutated. The original mouse's germ cells were mutated.
Since you provided no answer choices, I will assume the correct answer choice is ANCESTOR. A cladogram begins with a common ancestor of all the organisms represented above.
B. thick atmosphere
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Across 5: predation
across 6 hominid
down 3 : Distribution
down 9 : glaciations
