Question

which statement about the cambrian period is true? multicellular life was probably limited to aquatic environment. large land mammals evolved. oxygen concentrations were extremely low. the first multicellular life appeared. it marks the end of the paleozoic era.

Explanation:

During the Cambrian period, multicellular life was likely mostly in aquatic environments. Large land - mammals evolved much later. Oxygen levels were rising, not extremely low. Multicellular life appeared before the Cambrian. The Paleozoic era ended with the Permian - Triassic extinction event, not the Cambrian.

Answer:

Multicellular life was probably limited to aquatic environment.