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Describle internal structure of anther b...

Describle internal structure of anther by mentioning about typical stamen

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Two parts of a typical stamen are shown in the figure below. The long and slender stalk is called the filament and the terminal generally bilobed structure is called the anther. The proximal end of the filament is attached to the thalamus or the petal of the flower. The number and length of stamens are variable in flowers of different species. Collecting a stamen each from ten flowers the large variation in size is seen in nature. Careful observation of each stamen under a dissecting microscope elucidate the range in shape and attachment of anthers in different flowers.

A typical angiosperm anther is bilobed with each lobe having two the ca, i.e., they are dithecous.
Often a longitudinal groove runs lengthwise separating the the ca. Anther consists of four microsporangia located at the corners
The microsporangia develop further and becomes pollen sacs.
Pollen sacs are packed with pollen grains
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The neutron is a particle with zero charge still it has a non-zero magnetic moment with z-component 9.66 xx 10^(-27) A-m^(2) . This can be explained by the internal structure of the neutron. The evidence indicates that a neutron is composed of three fundamental particles calleed quarks : an "up" (u) quark, of charge + (2e)/(3) , and two "down" (d) quarks, each of change - (e)/(3) . The combinations of the three quarks prodcues a net charge of (2e)/(3) - e/3 - e/3 = 0 . If the quarks are in motion they can produce a non-zero magnetic moment. As a very simple model, suppose the u quark moves in a counter clockwise circular path and the d quarks move in a clockwise circular path, all of the radius r and all with the same speed v see figure. If all Quarks start moving in the same direction then what will be the magnetic moment of the neutron :-