At What Point in Geological Time Did the Common Ancestor

question 14

Essay

At what point in geological time did the common ancestor of mammals (including humans) and reptiles (including alligators) live? During what geological era was this?

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Definitions:

Borderwork

Interactions between boys and girls during middle childhood when there appear to be unwritten rules governing when and how the two genders will interact.

Mixed-Gender Interactions

Social or professional engagements between individuals of different genders, encompassing a range of contexts from casual to formal.

Accidental Contact

Unplanned or unintended interaction between individuals or objects, often leading to unforeseen consequences.

X-Linked Recessive Alleles

Genes located on the X chromosome that can result in a recessive trait or disorder manifesting primarily in males due to the presence of only one X chromosome.