Identify $X$ and $Y$ in the given figure,which represents the biome distribution with respect to mean annual temperature and mean annual precipitation.

Read the given statements and identify the correct and incorrect ones.
$(1)$ The exponential growth curve can be calculated using the formula $N_t = N_0 e^{rt}$.
$(2)$ Bamboo and salmon fish show the production of offspring only once during their entire lifespan.
$(3)$ In the amensalism type of interaction,one species is harmed and the other species receives no benefit or harm.
$(4)$ $A$ competitively superior species eliminates the inferior species in a habitat.

Which process allows organisms to protect themselves during stressful environmental conditions?

Countries with high population growth rates have taken measures to reduce them. The figure below shows the age pyramids of populations. Which of the following is a correct interpretation for their status after $20$ years?

What type of human population is represented by the given age pyramid?

The given human population age pyramid represents..........