Consider the following five infectious diseases: ebola hemorrhagic fever avian influenza sars west nile encephalitis mad cow disease what do these diseases have in common?

The correct answer is - these are emerging infectious diseases.

Explanation:

Ebola is an emerging virus cause Ebola hemorrhagic fever disease that is an infectious disease that infects the people by coming in touch with the infected animal or body fluids of other human or primates.

Avian influenza is also an infectious disease contracted by the contact of the infected bird and can be infected by the human cough sneeze. Similarly, SARS, West Nile encephalitis, and mad cow are the infectious disease that is emerging and infected by the various mode of infection.

Thus, the correct answer is - these are emerging infectious diseases.

step 1: nitrogen fixation- conversion of atmospheric no₂ into forms useful to plants by lightning, bacteria, and cyanobacteria.

step 2: nitrification-process of converting ammonia to nitrite or nitrate.

step 3: assimilation-plant roots absorb new form of nitrogen.

step 4: ammonification-conversion of organic nitrogen to ammonia by bacteria involved in decomposition.

step 5: denitrification-bacteria turns the decomposed matter back into n₂o, which is released into atmosphere; repeat cycle.

well, i believe that the answer is 2. : 3