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Why do few plants adapted to a dry environment open their stomata only at night?
Throughout the day in dry habitats the guard cells become the stomata close and flaccid; concurrently carbon dioxide is disallowed to pass to participate in diurnal photosynthesis. Few plants from dry regions solve this problem through the method of nocturnal carbon dioxide fixation. At night, as water loss by transpiration is lower, the stomata open, carbon dioxide enters and it is stored within the parenchymal tissues. Throughout the day the stored gas is mobilized to be used in photosynthesis
What is Saliva Saliva is the colourless viscous fluid. It helps in swallowing the food by lubricating the food and the neutral pH of saliva prevents the decalcifica
Q. What is the embryonic characteristic that evolutionarily makes echinoderms proximal to chordates? Chordates and Echinoderms are deuterostomes that is in their embryonic deve
Transposable elements are able to move around the genome by precise or imprecise excision events. What is meant by imprecise excision? A. Imprecise excision refers to a transpo
Explain about the Microcolony DEFT? It allows determination of viable cells. Food homogenate is filtered through a DEFT membrane and then placed on the surface of appropriate c
Q. Symptoms of mitral regurgitation? Symptoms depend upon underlying etiology of mitral regurgitation. Patients with mild mitral regurgitation and most of those with even sever
Q. How different are the actions of antibodies against virus and against bacteria? Why is the cellular immune response activated in case of chronic viral infection? The antibod
Q. Why is carbon monoxide toxic for humans? Hemoglobin "likes" carbon monoxide (CO) much more than it likes oxygen. When there is carbon monoxide in the inhaled air it binds to
Q. Bracketed Keys to identifying plants and animals? In bracketed keys two couplet leads of the same rank are bracketed together. The alternative clues or couplets are written
What is meant by substrates of enzymatic reactions? Substrates are reagent molecules upon which enzymes act. The enzyme has spatial binding sites for the attachment of its s
Explain the Determination of Hydrolysis Hydrolysis of calcium pantothenate in acidic medium produces α,γ-dihydroxy-β,β-dimethylbutyrolactone, which reacts with hydroxylamine i
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