20. Disaccharides are made from theof two monosaccharides.

A. oxidation-reduction reaction

B. dehydration reaction

C. reduction-elimination reaction

D. substitution reaction

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

put the answers   and i could answer.

po-215 i got it right on the quiz

1. a)c-14 has two more protons

2. d)they have different numbers of protons, neutrons, and valence electrons; they are all gases at room temperature.

3. c) iron and nickel.