Q33
Following are the responses of different animals to various abiotic factors. Describe each one withthe help of an example. (i) Regulate (ii) Conform (iii) Migrate (iv) Suspend
Solution
Regulate : Some organisms are able to maintain homeostatis by regulating their body temperatures. The mechanisms used by most mammals to regulate their body temperature are similar to what we humans use. Eg: Body temperature remains constant at 370C. In summer, when outside temperature is more than our body temperature, we sweat profusely and when the temperature is much lower than 370C, we shiver thus body temperature remains constant. (ii) Conform :Many animals, cannot maintain a constant internal environment. Their body temperature changes with the ambient temperature. These are conformers. Heat loss or heat gain is a function of surface area. Since small animals have a larger surface area relative to their volume, they tend to lose body heat very fast when it is cold outside. Eg. Shrews and humming birds. (iii) Migrate : The organism can move away temporarly from the stress ful habitat to a more hospitable area & return when stressful period is over. Eg: Every winter, the famous Keolado National Park in Bharatpur host thousands of migratory birds coming from Siberia & other northern regions. (iv) Suspend: In animals, if migration is not possible, they might avoid the stress by escaping in time. Eg: (1) Bears go into hibernation during winter. (2) Fishes go into aestvation to avoid summer related problems heat & dessication.
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