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Photoreceptor - Phototropism
The molecular nature of the photoreceptor is unsolved. Initially in the 1930s, some form of carotenoid was thought to be the phototropic receptor. General opinion at present, however, favors some kind of flavin as phototropic receptor, largely on the basis of the spectral match between phototropic action and flavin absorption in the ultra violet region. The action spectra for phototropism compare with the absorption spectrum of riboflavin and carotene, clearly favors riboflavin as the absorbing pigment. In some cases it can also be a flavoprotein.
Y-Linked traits in humans Any gene that occurs exclusively on the Y chromosome is said to be holandric and it is not expressed in females. Such a Y-linked gene normally occurs
VENTIL A TIO N OR BREATHING - 15-16 / minute (In Rabbit 36-38). In children 35 / 1 minute. 1 . INSPIRATION In take of air is known as inspiration. First o
V apour Theory (i) It was proposed by a Greek philosopher Pythagoras in 500 B.C. (ii) Each organ of an animal body emitted some kind of vapour and that a ne
What is a goiter? What is endemic goiter? How is this problem socially solved? Goiter is the abnormal enlargement of the thyroid gland. The goiter appears as a tumor in the ant
Explain the term Tracheostomy ? If the duration of mechanical ventilation is likely to be prolonged, it is wise to do an early tracheostomy. Otherwise, a tracheostomy is usuall
why succession more likely to occur on valley floor than steep slopes
Explain the process of metastasis. Define anti-angiogenic drugs and relate the role of medical imaging, if any, in anti-angiogenic drug therapy. State how you envision your particu
It is the preparatory phase. Cell organelle replicate and size of the cell increases. DNA molecule undergoes replication. Each chromosome exists as a pair of chromatids joined toge
Charles Darwin was the first person to suggest that: a. the present forms of all existing species are the result of natural selection b. species have changed over long periods of t
Q. Does pH affect the enzyme activity? The concentrations of hydrogen ions in solution affect the enzyme activity. Each enzyme has utmost efficiency under an optimum p H . S
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