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Loading and Unloading of Sieve Tubes
In order to understand the loading of food from manufacturing leaf cells to sieve tubes we must examine the anatomy of a minor vein shown in Figure. We can see
Figure: A cross-section of a minor leaf vein. (MC-Mesophyll Cell, XE -Xylem Elements, SE-Sieve Element, TC-Transfer Cells, PP-Phloem Parenchyma cell.
a xylem vessel (X), two sieve elements (SE) which are relatively smaller than other cells and without cytoplasm, the modified companion cells or transfer cells (TC) with dense cytoplasm and phloem parenchyma (PP) which is less dense and vacuolated.
Erythrocytes or red blood cells: These are otherwise called Red Blood cells or corpuscles. These are the most numerous cells in the blood.There are about 4.5 to 5.5x 10 9
Determine the Functions of Vitamin C? The vitamin C is involved in several physiological and biochemical functions in the body. Ascorbate is the biochemically active form of t
Characteristic of Callus The most important characteristic of callus from a functional view point is that abnormal growth has the potential to develop normal roots, shoots and
Planning of the Nursing Care 1) Educate and teach the parents 2) Provide preoperative and postoperative care. Educate an Teach the Parents The parents may be
Name the enzyme present in saliva and say what type of food it acts on. The enzyme in saliva is salivary amylase and it acts on starch.
Define Soy Protein Concentrates? The Association of American Feed Control Officials, Inc. (AAFCO) specifies soy protein concentrates as follows: "Soy Protein Concentrate is pre
Q. Explain causes of Shigellosis? Shigellosis is caused by the genus Shigella and is a common enteric (intestinal) infection. The genus has four serological groups,
Q. Describe some Food borne disease? Food borne diseases are caused by the ingestion of foods containing toxic or infectious agents. In India, the diseases transmitted by foo
Do disinfectants kill bacteria? Secure various types of commercial and house- hold disinfectants. Inoculate as more culture dishes as you have samples of disinfectant and singl
Define Iron requirements of infants? The maintenance needs for all age groups is 14 mcg/kg body weights. For infants and preschoolers, iron needs for growth and' expansion of b
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