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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.
Biotic Balance of Nature A nineteenth century Biologist is reported to have expressed, Glory of Britain is due to its old maids He reasoned Healthy Britons are nourished by roa
Soil Temperature Soil temperature is known to influence water absorption and ultimately transpiration to a considerable extent. In many plants water absorption is reduced shar
Two atoms always represent the same element if they have. A) the same number of particles in the nucleus. B) The same number of electrons. C) The same number of shells. D) The same
What are the stages into which photosynthesis is divided? Photosynthesis is separated into the photochemical stage, or light reactions, and the chemical stage. Photosynthesi
The distinct ecological importance of species supports functional diversity and has a direct bearing on the species composition of the site, and therefore on overall biodiversity.
MONOSACCHARIDES Simple carbohydrate monomers, which cannot be hydrolysed further into simpler or smaller subunits. Monosaccharides are generally colourless, crystallin
Q. What are the differences between anastral and astral mitosis? Astral mitosis is that in which there is formation of the aster a structure made by the centrioles. Anastral mi
what are the origin, morphology, active constituents, uses and market preparation of tanco beans
Companion cells are the specialized cells in the phloem which load sugars into the sieve elements and help to maintain a functional plasma membrane in the sieve elements.
Hormon e . The chief cells of the parathyroids secrete a hormone called parathyroid hormone (PTH) or parathormone or also called Collip's hormone after the name of its discove
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