c 13 ● Ecology deals with interactions among different organisms and their environment. ● Organisms get adapted to their environment for their survival and reproduction. ● The rotation of the earth about its axis brings about changes in the environment, leading to different seasons. This leads to the formation of various biomes such as desert, grassland, etc. ● Life not only exists in favourable habitats, but also in harsh and extreme conditions. ● The environment of an organism can be divided into: ○ Abiotic factors ○ Biotic factors Abiotic Factors ● Some of the major abiotic factors that interact with the organisms are: ○ Temperature − It is the most relevant abiotic factor since all organisms require an optimum temperature for their metabolism and other body functions. Depending upon their ability to tolerate temperature range, organisms are of two types- stenothermal (restricted to a narrow range of temperature) and eurythermal (can tolerate a wide range of temperature). ○ Wa...