Answer:b. The earth has warmed 10 times faster than it did coming out of the last Ice Age
Explanation: global warming from environmental degredation.
Atoms sharing valance electrons
the answer is false
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Answer:
C. Traits present in the last common ancestor of a certain group of species under consideration.
Explanation:
Ancestral character traits are the one that is present in the last common ancestor and all of its descendant groups. For example, the presence of the vertebral column is an ancestral trait for all the vertebrate groups such as birds and mammals as it was present in their last common ancestor and is also shared by them.