Bacteria usually reproduce asexually. In case of sexual reproduction, certain plasmids genetic material can be passed between bacteria. On the other hand, viruses mainly carry information-for example, DNA or RNA, packaged in a protein and/or membranous coat.Viruses harness the host cell's machinery to reproduce.acteria usually reproduce asexually. In case of sexual reproduction, certain plasmids genetic material can be passed between bacteria. On the other hand, viruses mainly carry information-for example, DNA or RNA, packaged in a protein and/or membranous coat.
The vegetative form of B. cereus grows in a range of 10 to 50Â°C, with a temperature optimum between 30 and 40Â°C. However, the individual cold-tolerating strains can also multiply at temperatures of 4 to 6Â°C; in these cases the generation times are, however, considerably longer.
Heating. Tropical fish require a normal maintenance temperature between approx. 22-29 o C (72-84 o F), with many species being kept at a 'middle value' of 24-25 o C (75-77 o F). Maintaining a stable temperature (and more importantly avoiding rapid changes) is vital to avoid stressing fish.The temperature of a tropical aquarium can be maintained in a number of ways.ropical fish require a normal maintenance temperature between approx. 22-29 o C (72-84 o F), with many species being kept at a 'middle value' of 24-25 o C (75-77 o F). Maintaining a stable temperature (and more importantly avoiding rapid changes) is vital to avoid stressing fish.