Is there a difference in the cfu/ml counts for the two treatment conditions

Heating kills most of the bacteria in the solution. Only some bacteria will survive whose temperature optima is higher, or are heat resistant.

Formula for calculating CFU/ml = no. of colonies * dilution factor / volume plated (in ml)

Suppose the number of colonies in normal solution plate comes out to be 300 and that in the heated solution plate comes to be 30, then cfu/ml for heated solution = 30*10^0/ 0.1 = 300 cfu/ml; and cfu/ml for normal solution = 3000cfu/ml

organisms are more likely to be more preserved in mud than sand because mud is moist and wet, while sand is very dry.

answer is: naturally occurring solid, inorganic compound or element is mineral.

minerals usually have crystalline form, that means than crystal constituents (atoms, molecules or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions.

for example magnetite is a mineral of iron oxide (fe₂o₃).

calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (caco₃).

dolomite is an   carbonate mineral composed of calcium magnesium carbonate (camg(co₃)₂).