Plants lack an internal tubal system

Non-vascular plants.

Explanation:

Non-vascular plants are those plants in which vascular system having xylem and phloem is absent. In these plants, an internal tubal system that transports water and other nutrients is absent and they possess simpler types of tissues for internal transport of minerals and water by osmosis or diffusion.

Thus, the correct word is to be filled in the blank is 'non-vascular.'

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:

the cost of mining is extremely low compared to the money earned from mining, creating income to improve the environment.