urgent which are characteristics of all protists? check all that apply. 1. they are heterotrophs. 2. they have nuclei. 3. they live in moist environments. 5. they reproduce sexually. 6. they are unicellular.

A  reaction  in which  energy  is  released  to the surroundings is called an exothermic  reaction. in this type of  reaction  the enthalpy, or stored  chemical energy, is lower for the products than the reactants. when ammonium nitrate is dissolved in water,  energyis  absorbed  and the water cools.