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Osmotic Function - Essential Elements
Plant cells generally contain mineral ions 10 to 1000 times higher in concentration than the surrounding soil. That is why water enters the cells by osmosis and builds up turgor. You know that turgor maintains the shape and size of non-rigid plant parts such as leaves. Potassium is a key ion in this respect. Changes in its concentration in guard cells affect turgor and thus result in opening and closing of stomata. Turgor is also essential for the growth of plant cells.
A biologist examines a series of cells and counts 140 cells in interphase, 10 cells in metaphase, 4 cells in anaphase and 7 cells in telophase. if complete cell cycle requires 24 h
How does the interaction between a carrier protein and the substance it transports resemble the interaction among an enzyme and its substrate? Both include the binding of a spe
The description and measurement of circadian rhythms. Describe the standard method used for the recording and graphing of behavioral rhythms in animals, especially the use of
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Which are the plant tissues that form the plant roots? The roots have a central portion known as medulla made of vascular tissue (inner xylem and outer phloem). The medulla is
describe sds page for the proteins
Distribution of Stomata There are two parameters normally used for expressing the distribution of stomata. Stomatal frequency: The number of stomata per unit area
what are the sources of infection (human, animal and non-living reservoirs), the routes of transmission (way in which the infection spreads) and different ways in which micro-organ
Consider a properly functioning positive feedback system whose output variable is not equal to plateau at 1:00 AM. At 1:00 AM, A. when the value of threshold is greater than t
Q. Why is the uricotelic excretion essential for reptile and avian embryos? In birds and reptiles the excretory system is uricotelic since uric acid is less toxic, insoluble an
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