All of the following support the idea that the continents were once joined together in Earth’s past, EXCEPT – mountain ranges and bedrock levels on different continents match.
mountain ranges and bedrock levels on different continents match.

a plant fossil is found in only one, isolated location on Earth.
a plant fossil is found in only one, isolated location on Earth.

the shapes of the modern continents appear to fit together like the pieces of a puzzle.
the shapes of the modern continents appear to fit together like the pieces of a puzzle.

fossils of similar reptiles are found on the coastlines of different continents

  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-

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.