List the attributes that populations but not individuals possess.

List the attributes that populations posses but not the individuals.

Viruses possess

Asthma may be attributed to

Explain population density.

Asymptote is the stage when a population is

List reasons for population explosion.

Write other two characteristics of a population which are not shown by an individual.

"The population of a metro city experiences fluctuations in its population desity over a period of time." If 'N' is the population density at the time 't' , write the population density at the time 't+1'.