Asap : )what best describes how water moves in one continuous column from a plant’s roots to its leaves? a. polarity and cohesionb. density and buoyancyc. cohesion and adhesiond. polarity and surface tension

The correct answer is option C, that is, cohesion and adhesion.  

The molecules of water stay near to each other via cohesion, that is, the combined activity of hydrogen bonds amongst the molecules of water. The property of cohesion assists the plant to move water upwards from the root via the xylem towards the leaf.  

At the same time, adhesion between the molecules of water to the cell walls of the plant assists to counteract gravity while water is conducted from the roots to the leaves. Thus, both the cohesion and the adhesion produces a capillary action, which keeps the molecules of water interacting with each other and conducting via the plants out to the cells of the leaf.  

  the   balanced   equation   for   reaction of   ca metal   with   o2 to   produce   cao   is as below

2 ca+ o2→ 2 cao2

  explanation

the reaction is   balanced     since the   number of atoms   in reactant side is   equal to   number of atoms   in   product side.   for   example   they   are 2   atom of   ca in   reactant   side   and   2   atoms of ca   in   the product side.

  the   process   is a   meet the   requirement   of   redox   reaction because :     calcium   is   oxidized   from   oxidation state 0   to 2+   while   oxygen   is reduced from   oxidation   state   0   to 2-

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