ad space networks

In the second century AD a Greek writer named Lucian wrote a story about a trip to the moon. He did not even know how far the moon was but his story revealed that the idea of space travel was certainly not ne..

Introduction - In the second century AD a Greek writer named Lucian wrote a story about a trip to the moon. He did not even know how far the moon was but his story revealed that the idea of space travel was certainly not new. Much later in 1865, the French novelist Jules Verne w..

The cardiac muscle fibres do not form fasciles. They are arranged in the form of a network. The muscle fibres are elongated, cylindrical and branched. The branches become inter-connected with one another to form a network. The space between the muscle fibres is f..

Within the nuclear membrane, completely filling up the space, is a clear, semi-solid, granular substance or matrix called the nucleoplasm. The nucleolus and the chromatin network lie suspended in the nucleoplas..

In long-distance lines, losses are so high that satisfactory operation becomes impossible without the use of amplification. Amplifiers for telephone service are known as repeaters, and they must of course function in both directions along the line. Repeater stations are ordinarily installed at 50-m..

Cardiac Muscle - It is also known as heart muscle. The cardiac muscle fibres do not form fasciles. They are arranged in the form of a network. The muscle fibres are elongated, cylindrical and branched. The branches become inter-connected with one another to form a network. The h..

Emmigration is the permanent movement/departure of individuals of same species out of the local population due to several reasons such as lack of food, scarcity of space (over crowding), etc. Emmigration decreases the size of local population, but the species spread to new areas. If more..

Natality rate is the rate at which new individuals are added to a particular population by reproduction (birth of young ones or hatching of eggs or germination of seeds/spores). It is generally expressed as number of births per 1,000 individuals of a population per year. 'Absolute', 'phy..

Greenhouse Effect - The Greenhouse effect is the rise in temperature that the Earth experiences because certain gases in the atmosphere (referred to as greenhouse gases), trap energy from the Sun. Without these gases heat would escape back into space and living on Earth would be inhospita..

. They show a (9+o) arrangement of microtubules. They are involved in the formation of spindle fibres during cell division and the basal bodies of cilia and flagella. Cilia and flagella are found in the surface of motile cells. They show a (9+2) arrangement of microtubules. These structures help in..