They are called circadian rhythm. Circadian rhythms are physical, mental and behavioral changes that follow a repeated daily cycle. They are usually biological processes that display an oscillation of about 24 hours and occurs in animals, plants and even cyanobacteria. The process responds to changes in light and darkness in the surroundings of an organism.
<u>Most liquid freshwater is found under the Earth's surface as groundwater or aquifers, while the rest is found in lakes, rivers, and streams, and water vapor in the sky. </u>
About 68% of freshwater is found in glaciers and icecaps such as in Greenland, the poles, and other glaciers. Another 30% is found in groundwater, which basically means aquifers. Only 1% of freshwater is found in surface water such as lakes, rivers, etc.
"Function of a reservoir in a nutrient cycle is to meet the deficit which occurs due to imbalance in the rate of influx & efflux. Give an account of energy flow in an ecosystem."
