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Wigs and hairs - Seed Appendages
Seeds of certain plants have epidermal outgrowths or the integuments themselves may form folds and projections that present a wing-like appearance. In the tree Oroxylon sp. a thin, transparently white, circular or oval, disc-like wing spreads all around the two-lobed seed. The seed of cucurbit Zanonia macrocarpa has wings measuring up to 10 cm.
In the drumstick plant Moringa oleifera the seed has three equidistant wings. Seed wings provide large surface area, with optimum strength, combined with a minimum of material. A surprisingly large number of winged seeds can be arranged compactly in a fruit. Wings help the seed to propel, sail or spin some distance away when released from the fruit.
Improvement of Soil Aeration Soil organisms greatly improve soil structure and facilitate aeration. Root decay leaves the soil riddled with channels, and the burrowing of worm
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State about the Latent squint disease Latent squint is seen commonly as exophoria in infancy and presbyopic age and esophoria in childhood. Hypermetropes can have esophoria and
What are some diseases characterized by progressive loss of the axonal myelin sheath? Multiple sclerosis is a severe disease caused by progressive destruction of the myelin she
It is conversion of antibody class to another resulting from genetic rearrangement of heavy chain same region genes in B cells. Isotope switching is also known as class switching.
Water Absorption and Transpiration The rate of water absorption is controlled by the rate of transpiration. A high water potential in the atmosphere would reduce water loss fr
Behavioural Counseling This evolved froni tlie early theories of behaviourism. The focus is on examining current behaviours and learning new ones. It is believed that feeli
Distribution of Stomata There are two parameters normally used for expressing the distribution of stomata. Stomatal frequency: The number of stomata per unit area
BAER' S LAW - It was given by K.E. Von Baer. Von Baer was the first scientist who studied the embryology systematically. According to it, in the embryonic development of an
Isomerases These enzymes (code EC 5) catalyze geometric or structural changes within a molecule. According to the type of isomerism, they may be called racemases
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