Water freezes and melts at 32 degrees Fahrenheit (0 degrees Celsius), while milk melts at about 31 degrees Fahrenheit (-0.5 degrees Celsius). Other ingredients like sugar, cream, salt, Red #3, and so forth will change the overall melting temperature of the ice cream.
Confidence votes 1.3K. Both types of bacteria exist. Some are autotrophic while others are heterotrophic. Most autotrophic bacteria can synthesize their food from substances like hydrogen sulphide. This process is called chemosynthesis and involves the use of chemical substances for the production of energy.
Archaebacteria --Prokaryotic, unicellular, nutrition by absorption (heterotrophic). This group of bacteria-like organisms live in harsh (high temperature, salinity, etc.) environments similar to that of ancient earth (hence the name). They cell wall structure is different than that of typical bacteria.