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Question:

Consider the following statements (A) - (D) each with one or two blanks. (A) Bears go into (1) during winter to (2) cold weather. (B) A conical age pyramid with a broad base represents (3) human population. (D) An area with high levels of species richness is known as (5) Which one of the following options give the correct fill ups the respective blank numbers from (1) to (5) in the statements?

(1) - aestivation, (5) - escape, (3) - stable, (4) - mutualism

(1) - hibernation, (2) - escape, (3) - expanding, (5) - hot spot

(2) - stable, (4) - commensalism, (5) - marsh

(3) - expanding, (4) - commensalism, (5) - biodiversity park

Solution:

Bears hibernate as a way to adapt to their surroundings. They have to be able to survive the cold weather. They hibernate to escape the cold and because the food is scarce. Youthful populations are represented by pyramids with a broad base and conical top because of the expanding population. A biodiversity hotspot is a biogeographic region with a significant reservoir of biodiversity that is under threat from humans.