Mammals share which of the following extraembryonic membranes with reptiles and birds? a) chorion. b) amnion. c) allantois. d) a and b. e) a, b and c.

E) A,B and C

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the oceanic zone is typically defined as the area of the ocean lying beyond the continental shelf, but operationally is often referred to as beginning where the water depths drop to below 100 meters (328 feet), seaward from the coast to the open ocean.

explanation:

thinking it would be physical characteristics