development patterns

Magnetic Field Lines - The compass needle always lies along the direction of the field. The figure below shows the lines or pattern of the field, when the compass needle is placed at several places. These lines do not really, tell us the effect that magnet has on the other. These field li..

When more than two branches develop at a time the branching is said to be multiparous or polychasial. Eg. Euphorbia, Croton bonplandianum. fig. 27.16 - Cymose or Definite Ty..

Passage from childhood to adulthood through adolescence involves number of psychological changes. Some of them are: i) Acceptance of responsibilities. ii) Increase in concentration. iii) Logically controlled and monitored behaviour. iv) Development of socially acceptable habits. v) Abilit..

Mendel (1822-1884) was born in to the family of a poor peasant in Moravia, Austria. He received his school education with utmost difficulty due to poverty in the family. In 1843 he joined a church as a monk where in 1847 he became the abbot (head) of the monastery at Brunn, Austria (now called Brun..

The laser is an acronym for Light Amplification by Stimulated Emission of Radiation. The laser has been invented and developed in 1959 and 1960. In the laser, the maser principle has been extended to optical or visible light frequencies of 10 1 4 to 10 1 5 cycle/s. Laser may be called "op..

.g., nocturnal activity of some desert animals, long trips migration by many birds. E.g., Arctic terns, Siberian crane, American golden plover, Bison and caribou. vi) Homeothermy This is achieved through evaporation of sweat in the mammals from their bodies during summer and through insulation acti..

Geological Distribution - The organisms show particular patterns of distribution on earth. The distribution of the species give an indication of how the earth was earlier. It is believed that the earth was a single mass called the Pangea. It consisted of two large continental masses calle..

>Darwin believed that tiny particles called pangenes are formed in the different parts of the body, which migrate to the gametes. The blending theory on inheritance became replaced by the particulate theory of inheritance due to the contributions made by John Gregor Mendel (1822-1884). Mendel condu..

>Space-based remote sensing is a new technology. It has high potential for applications in nearly all aspects of resource management. India recognized the potential of this technology quite early. India conducted several remote sensing experiments in the late '60s and '70s using airborne sensors an..