In some tribes,the population does not grow appreciably because of

If the population size at time $N_{t+1}$ is $1000$,and there is no immigration or emigration,and the death rate is $50\%$ less than the birth rate,and the population size $1$ year ago $(N_t)$ was $800$,what is the number of births?

If in a population,the number of organisms added by $B + I$ is less than the number of organisms lost by $D + E$ at time $t$,but the population size $N$ at time $t+1$ is $10$ times greater than the initial population size,which of the following characteristics can be inferred?

Which of the following formulas can be used to measure exponential growth?

The cause of zero growth of population is

The statement 'Food supply increases in an arithmetic progression,while population tends to increase in a geometric progression' was proposed by: