Consider the following statements (i-iv) each having one or two blanks.
(i) Bears go into .....(1)..... during winter to .....(2)..... cold weather.
(ii) A conical pyramid with a broad base represents .....(3)..... human population.
(iii) A wasp pollinating a fig flower is an example of .....(4)......
(iv) An area with a high level of species richness is known as .....(5)......