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.
1 Symbiotic bacteria: These bacteria have a mutual benefit from other organisms. 2  For e.g.: nitrogen fixing bacteria (or) rhizobium. 3  Parasitic bacteria: These bacteria are present in plants, animals and human beings. 4  These bacteria feeds on host cells and causes harm to the host. Heterotrophic bacteria: These bacteria are unable to synthesize their own food, hence they depends on other organic materials. 2  For e.g.: saprophytic bacteria-these bacteria feeds on dead and decaying matter. 3  Symbiotic bacteria: These bacteria have a mutual benefit from other organisms.