association science teachers

. The system of tubules consisting of the vasa efferentia, epididymis, vas deferens, ejaculatory tube and the urethra is the duct system associated with the male reproductive syst..

Each energy level is associated with a fixed amount of energy. The shell nearest to the nucleus has minimum energy and the shell farthest from the nucleus has maximum energy. There is no change in the energy of electrons as long as they keep revolving in the same energy level. But when an..

Such salts are formed by the intimate association of two simple salts, when crystallized from a solution of a mixture of the two. Some Common Double Salts Potassium alum Ammonium alum Ferric ammonium alum ..

Coordination in Plants - In case of plants, growth and development is in a coordinated manner. The higher plants do not show locomotion. However, locomotion is seen in structures like sperm cells of ferns and mosses that swim towards the egg. The other movements shown by the plants are associa..

The radiant energy from the sun is the source of both light and heat energy to photosynthesis. Light energy is harvested by the pigments in order to carry out the breaking down of water molecule into hydrogen and oxygen. This is an energy-intensive process. Sunlight can be split into seven differe..

>In this way even before knowing what elements were, man started extracting them from their ores. A few metals like gold, silver, iron, copper, lead, tin and mercury were used as far back as 2000 years ago, in the 1 st century A.D. A mention of them is made in the 'Charaka Samhita' - a medical trea..

. iv) Each energy level is associated with a fixed amount of energy, the shell nearest to the nucleus has minimum energy and the shell farthest from the nucleus has the maximum energy. v) There is no change in energy of electrons as long as they keep revolving in the same energy level, an..

Methods of Reproduction - There are basically two types of reproduction - asexual and sexual. This classification is based on the number of parents. Asexual reproduction involves only one parent and the offspring is genetically similar to the parent. Sexual reproduction involves two parents and the..

. Symbiosis is the association of two dissimilar organisms. The association may be mutually beneficial (mutualism), benefiting one organism and harming another (parasitism) and benefiting one but having no effect on the other (commensalism). Parasitism is defined as an asso..

>The male gamete of one individual fertilizes the female gamete of another individual to produce the zygote. The fertilisation may be external or internal. External fertilisation takes place in animals like the fish and frog where the fertilisation takes place in water, outside the body. In interna..