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Stem - Plant Growth Substances
The role of auxins, cytokinins, ethylene and abscisic acid in controlling the apical bud dominance and lateral bud dormancy (Apical Dominance) are discussed earlier. Auxins also play a role in phototropism, geotropism and other responses of stems. Auxin-cytokinin interaction regulates the differentiation and growth of shoots from callus. Gibberellins stimulate cell division and cell elongation in shoot apices. Gibberellins abolish the dwarfism (rossette conditions) in plants and promote stem elongation.
Subphylum Opalinata Body covered with longitudinal rows of cilium like ,organelles but true ciliature absent. Parasitic; cytosome lacking; two to many nuclei of one type.
Phases of Respiration in Animals The procedures of respiration in these animals have the following phases. i) External respiration is usually described as breathing. It inv
The chemicals responsible for imparting the sweetness, classic salt taste and bitter and sour taste are summarized herewith. A. Sweet Taste Sweetness is one of the most importa
Pollen Stigma Interaction - Stigma The Stigma After landing on the stigma pollen grain germinates, and produces a pollen tube that carries the male gametes. The stigma has bee
Effect of processing on mineral content of foods Minerals are comparatively stable under processing conditions such as heat, light, use of oxidizing agents and extremes in pH.
Scope of embrology
Why is not Mendel's second law always valid for two or more phenotypical traits of an individual? Mendel's second law, or the law of the independent assortment, is valid for g
Mature Embryo A typical dicotyledonous embryo, as seen in a median longitudinal section, consists of an embryonal axis having two broad cotyledons. The portion of embryonal ax
Q. How does the swim bladder of fishes work allowing fishes to control their depth under water? From Hydrostatics it is known that an object does not sink if its density is les
What is the rule for the pairing of nitrogen-containing bases in the DNA molecule? And in the RNA? The rule for the pairing of nitrogen-containing bases of the polynucleotide c
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