The evidence that scientists currently have suggests that life on earth a. began in the waterb. first evolved around 3,500 million years agoc. began as single-celled organismsd. a and be. all of the above

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: