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How do plants solve the problem of transporting substances throughout their tissues?
In bryophytes the substance transport is completed by diffusion. In tracheophytes (pteridophytes, gymnosperms and angiosperms) there are specialized conductive vessels, the xylem that carries water and mineral salts and the phloem that conduct organic material (sugar).
Plant Physiology - Image Diversity: xylem
Cosmid: The type of artificially constructed vector taken in use for cloning the 35-45 kb of DNA. These are plasmids carrying the phage l cos site (which permits packaging into l
An increase in the calcium conductance of all sarcoplasmic reticulum membranes of a skeletal muscle with no external forces on it leads to A. an increase in the amount of calci
What is syphilis? Syphilis, also known as lues, is a disease caused by the bacteria Treponema pallidum. Before the discovery of penicillin, syphilis was a fatal disease. Today
Define the uses of foams The foams frequently used in cookery are whipped cream, ice cream, cake, bread, meringues, milk froth and gelatin. Food foams contain large amounts of
Compare and contrast the effect of a deletion in the operator of the lactose operon with one in the operator of the histidine operon.
Q. In the phase when the cell is not dividing interphase is there activity within the cell nucleus? In the interphase there is intense metabolic activity in the cell nucleus th
Define Sodium, Potassium and Chloride - Minerals? Claude Bernard was the first to draw attention to the internal environment (milieu interior), referring to the extracellular f
Preliminary treatment of implant therapy It is important to ensure a healthy oral environment before going ahead with implant procedure. The treatment needs to be initiated in
mode of respiration in difrent animals
Controlling Introduction of Alien Species As you know the alien species can cause the existing population to decrease or even become extinct. The individuals of alien species
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