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The researchers collected samples of different species of leaves and measured their repellency by comparing the contact angles of water droplets of a uniform size deposited on their surfaces by the use of pipettes under laboratory conditions.
Experimental Results:
Contrary to the experimental expectations, the results of the experiment did not support the initial hypothesis: some of the leaves collected from the drier environments exhibited greater water repellency than some of the leaves collected from the wettest environments. After analyzing the data, the researchers proposed an alternate evolutionary purpose for the mechanism behind water repellency of different...
According to this hypothesis, the purpose of high water repellency is to promote the efficient draining of rainwater in regions where moisture is scarce, to increase the amount of water available to the roots of their trees. The results naturally suggest repeating similar experiments in conjunction with this alternate hypothesis.
Water Pollution Water is an important natural resource upon which all the living beings rely for their existence and growth. Nature has blessed the earth with uncountable water resources but usable quantity is limited. Hence, it is important to use water sparingly. The irony is, human activities result is high water pollution which further shortens the water supply for use. "In an age when man has forgotten his origins and is blind
Water Global Human Needs System Thinking and Transformative Social Systems in Sustainability It is a fact that above 70% of the surface of the Earth is water. However, the real issue despite the abundance of water is the availability of fresh water (Amanda, 2013). Of the total waters on Earth, 97.5% of this is salty water; this leaves only a 2.5% as fresh water. To add on this deafening fact, of all
In the absence of proper waste management laws and regulations, as well as poor enforcement of existing waste disposal laws, an increase in the number of manufacturing entities would inevitably increase instances of water pollution. According to Goel (2006), the mere fact that smaller cities report less instances of water pollution than larger cities is a clear indicator of the relationship that exists between population density and water pollution
Water Pollution The vast majority -- over 70% -- of our earth is covered by water. Unfortunately for our thirst, 97.5% of all the water on the planet is salt water. Only 2.5% of the water on planet earth is fresh drinking water. Given that there is such a small percentage of drinkable water on the planet, the resource has become a scarce commodity. Making matters worse is the fact that
Water Privatization How Privatization of Water is Bad for the World Water is a scarce resource, a fact that is becoming more evident as time goes on and pollution becomes more evident. There are many instances where privatization has been beneficial; bureaucratic red tape often makes policy making a headache for consumers, and some eagerly advocate for privatization of certain resources. Privatization often has advantages, but in many instances it also realizes
Although the Murray-Darling River covers only about 14% of Australia's irrigated land, 50% of Australia's sheep and 25% of Australia's cattle rely on this source. Also, 40% of the nation's rice crop and 80% of its canned fruit product relies on the Murray-Darling River Complex. In all, three-quarters of Australia's water comes from the Murray-Darling River (Hussainy, p. 205). Of course there are conflicts when so much is at stake.