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These plants float freely and independently on the water surface. Examples: Eichhornia, Pistia, Wolfia and Lem..

Similar to free central but the placental column does not reach the top of the ovary. e.g., Portulaca, Celosi..

According to this theory, accumulated damage caused by oxygen radicals causes cells to stop functioning and eventually organs also stop functioning. An oxygen free radical is a by-product of normal metabolism produced when cells turn food and oxygen into energy. This free radica..

The micro-organisms like cyanobacteria (blue-green algae) and photosynthetic bacteria can also fix nitrogen. Some cyanobacteria also act as symbionts and are present in association with lichens; liverwort - Anthoceros; fronds of water fern - Azolla and roots of a gymnosperm - Cyc..

Bio - war - Bio - war refers to biological war. It means that biological organisms are used as weapons to carry out the war. It is latest form of war. It is carried out by spreading the pathogens in specific part of geographical region to deliberately spread ..

Bio - war refers to biological war. It means that biological organisms are used as weapons to carry out the war. It is latest form of war. It is carried out by spreading the pathogens in specific part of geographical region to deliberately spread a deadly disease..

The harmful insects and disease causing plants are controlled by the application of their natural parasites and predators. 1) Baculo virusis infect the larval stage of many harmful insects such as wasps and beetles but are harmful to non target organisms. 2) Bacteria Bacillus thuringensis contains..

Bio piracy refers to unauthorised and unlawful access to biological secret and use of such secrets for specific gai..

Bio-piracy - Bio piracy refers to unauthorised and unlawful access to biological secret and use of such secrets for specific gain. In biological research many secrets have been unravelled. Genetic structures of potentially useful organisms, genetic structures..

Patenting was considered exclusively in industrial domain. Inventions, production processes were patented since long. But recently patenting is extended to biological field too. Bio-patent is the result of TRIPS (Trade related intellectual property right) as a part of WTO ..