Four bacteria and virus questions.?

1. what are the steps how a virus can be present in your body but no physical characteristics are shown? what are the 2 types of reproductive cycles?





2. what are the 2 main typesof metabolism and reproduction? why are they unique? examples





3. what are 3 ways how bacteria are economically important? examples?





4. what are 3 factors that limit bacteria growth? if bacteria is in almost every habitat and environment, how come they dont take over the world?

Four bacteria and virus questions.?
1.By Lysogeny because the virus stays in most of the cells inactive for a long time eg HIV virus. Two types of cycles are: Lysogeny and Lytic cycles.





2. Reproduction: Lytic(eg Flu) and Lysogeny(eg HIV virus which causes AIDS). They are unique because they reproduce only inside the hst cell and use the host's energy and enzyme to multiply.





3. They are important in industries to increase soil fertility by three ways:


a. convert nitrogen from the air into an acceptable form nitrogen fixing bacteria)


b. the bacteria converts this nitrogen compounds(nitrite and nitrate bacteria)


c.Soil nitrates re converted back to atmosphereic nitrogen(denitrifying bacteria)





4. a. the shortage of food


b. the shortage of oxygen


c. the accumluation of waste products.


Because of these limiting factors, the rate of bacteria growth is controlled, or else they would multiply at about the rate of 17million bacteria in 12 hours.