$J$-shaped growth curve depicts:

Which of the following is correct for $r$-selected species?

When the number of bacteria growing per minute is plotted against time on a logarithmic scale,what shape does the graph take?

In a population growth curve,which of the following equations represents the sigmoid growth curve?

The formula for exponential population growth is

Read the following statements and determine how many of them are correct:
$(1)$ Population is the total number of individuals of a species in a given area at a given time.
$(2)$ Developed countries show a low birth rate.
$(3)$ An equal proportion of reproductive and post-reproductive age individuals indicates a stable population.
$(4)$ In the presence of limited resources,the growth curve is sigmoid ($S$-shaped).