What is the term for the boundary between vadose water and groundwater?

The answer is water table. Water table is the boundary between vandose zone and the zone of saturation. The unsaturated is the vandose while the saturated is the groundwater zone. Water table is located in the top of an unconfined aquifer, that can tell the level below which soil and rock are saturated with water and the top of the zone that is saturation. 

above statement is not a true statement about the open ocean because the open ocean has low levels of nutrients. most of the photosynthetic activity on earth occurs in the open ocean within the photic zone. organisms in the deep ocean are exposed to frigid temperatures and total darkness but it does not begin at the low-tide mark.

answer: dna

because all cells have genes