Why aren't mountain ranges and polar ice caps classifies as biomes?

What’s this animal (picture is tagged) and where is it most likely to live, rainforest or desert?

Development of new communities in disturbed environments, such as a burned or a clear cut forest, is called

Which of the following describes a boom period? a. as one population increases, another population decreases. b. as one population increases, the other population also increases. c. as one population decreases, another population increases. d. as one population decreases, another population also decreases