9th grade biology

Acoelomata In acoelomata, the body cavity is not seen. The space between outer body wall (skin) and inner body wall (alimentary canal) is occupied by a tissue called mesenchyme. This condition is seen in flat worms (Platyhelminthes..

Eucoelomata In Eucoelomata a true body cavity is present. It is called coelom. It is a body cavity which is lined by mesoderm (or coelomic epithelium). This condition is seen in the remaining group of animals from annelids to vertebrates. fig. 10.2 - Diagrams to Show Acoelomate, Pseudocoeloma..

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 ..

The movement of certain substances will have to occur against a concentration gradient. As such the movement requires some biological process involving expenditure of ener..

Biological Magnification - Certain harmful substances, usually ones not found in nature but introduced by man, may get into plants and/or animals. These poisonous substances may not be broken down in the body or excreted easily, efficiently and quickly. Instead, they accumulate in the tis..