Question
i. Which of the above represents the increase or decrease of population?
ii. If N is the population density at time $t$, then what would be its density at time $(t+1)$ ? Give the formula.
iii. In a barn there were $30$ rats. $5$ more rats enter the barn and $6$ out of the total rats were eaten by the cats. If $8$ rats were born during the time period under consideration and $7$ rats left the barn, find out the resultant population at time $(t+1)$.
iv. If a new habitat is just being colonized, out of the four factors affecting the population growth, which factor contributes the most?