Ocean is a vast natural resource of water. These have also been examined in the search for alternate sources of energy-generation. For example, gravitational pull, by sun and moon causes tides, in which sea level rises and falls, two times in 24 hours. When it rises, sea water may be diverted through suitable channels, to inshore reservoirs driving the turbines, during its entry.
The population explosions of earlier and present days have already caused and are still causing serious impacts on the global environment. As for the biological environment, the human population has stressed most biological systems, comprising flora and fauna, as well as biological diversity.
Sun is the only source of energy in the biosphere. Every living being can get its share of energy through food only and the energy is directly or indirectly obtained from green plants only.
A population is a group of individuals (all members of a single species) who live together in the same habitat and are likely to interbreed. Each population has a unique physical distribution in time and space. It may contain individuals of different ages, and its size (density) is likely to change over time. It grows or shrinks according to the reproductive success of its members.
Cuscuta is found throughout the temperate and tropical regions of the world. It has great species diversity in subtropical and tropical regions of the world. It has many folk names like wizard net, devil’s hair, goldthread, hair weed, love wine; strangle weed, angel’s hair, and witch’s hair.
Hindus and Hindu tribals believe that certain Gods live on some trees. They worship these trees and protect by all means. These trees are called as sacred groves.
The bio-mechanical process of exchange of gases between an individual and his atmosphere is called as breathing.
The Heavy Engineering Corporation (HEC), Ranchi, Jharkhand has decided to make turbine for generating electricity from the Wind Energy. For this HEC has decided to take technology from the Sky Wind, a company of Germany.
Auxins move to darker side of the part of a plant and cause cells of that side to grow larger. These may induce cell division as well. In both of these cases the part of the plant bends.
There are three phases of development of technology- invention, innovation and diffusion. The invention is a process which incorporates wide range of ideas, material things, and human behaviour in new systematic ways.
Images of a number of vegetables start sliding one by one just as a slide show on the screen of the mind as we enter into the winter session of the yearly cycle. These vegetables are very important to us not alone for their taste value but for their medicinal and health value as well. Here is an introduction of two of these vegetables.
Some environmentalists define land pollution as – build up of toxic chemical compounds, salts, pathogens or radioactive materials in soil that can affect plant and animal life adversely, is called as soil pollution.
