<span>As mentioned above, humans have sweat glands over their entire bodies; the only place dogs (and cats, and many other animals with fur over their whole bodies) can get rid of excess heat is through the tongue. By the way, sweating/panting is NOT a means of getting rid of excess water; it is a way of getting rid of heat. We do this because of the process of evaporation. In changing from liquid to vapor, the water absorbs heat from the surface on which it is laying. Actually, most organisms do not want to get rid of excess water; they need to conserve it, but on very hot days animals "spend" the water to achieve the cooling.</span>
From the North Pole, the sun is always above the horizon in the summer and below the horizon in the winter. This means the region experiences up to 24 hours of sunlight in the summer and 24 hours of darkness in the winter.
<em>Reduction in populations of insect pests is a benefit of crop rotation.</em>
Croprotation is an agricultural practice in which different crops are grown in different seasons on the sample piece of land in order to avoid the depletion of a single type of nutrient from the soil.
This practice is beneficial in reducingthe pests in the field because if only one kind of crop is grown then the pest that feeds on it will grow in number, however, due to crop rotation, the crop that is grown is chosen in such a way that same pest does not feed on it.
For example, if cotton and legumes are grown in rotation, then the pest of cotton cannot feed on legumes and hence it will not build in the field.
