Question

lections and conclusions
what is the difference between how land plants and water - dwelling plants get the carbon dioxide that is necessary for photosynthesis?

Explanation:

The problem is about photosynthesis and how land and water - dwelling plants obtain carbon dioxide for it, which falls under Biology (a subfield of Natural Science). Land plants take in \(CO_2\) from the air through stomata. Aquatic plants can absorb dissolved \(CO_2\) from the water (some also get it from bicarbonate ions in water, and some emergent aquatic plants can take it from the air too). The key difference lies in the source medium (air for land plants, water - dissolved \(CO_2\) or bicarbonate for many aquatic plants) and the structures/mechanisms used to acquire \(CO_2\).

Answer:

Land plants obtain \(CO_2\) from the air via stomata. Water - dwelling plants can absorb dissolved \(CO_2\) from water (some use bicarbonate, emergent ones may use air). The difference is in the source (air vs. water - based) and acquisition mechanisms (stomata vs. absorption from water or use of bicarbonate).