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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.
Fragmentation and Regeneration Both the situations mentioned above that is whether occurring naturally or accidentally, can in general, be categorized like fragmentation. Of
Empyema: Empyema is accumulation of thick pus in the pleural cavity. Primary infection of pleura does not arise so the pathology may either be in chest wall, mediastinum or t
Define Equilibrium between two solid phases and a gas phase? Consider the following reaction equilibrium: 3 CuO(s) + 2NH 3 (g) ↔ 3 Cu(s) + 3H 2 O (g) + N 2 (g) Accordin
ORGNELS WITH SINGLE WALL
Q. Dietary Management fo oesophagitis? Providing adequate nutrition support may require emphasis of different aspects during acute and chronic oesophagitis. In acute phase,
How does a person with drown syndrome obtain a third chromosome 21?
Blood Salvage and Bloodless Open-heart Surgery: At the time of cardio pulmonary bypass, cardiomony suckers suck blood from the chambers or the heart and pericardium back into the
DISORDE R RELATED TO NUTRITION AND DIGESTIVE SYSTEM Malnutrition Malnutrition is improper intake of food. Malnutrion covers both undernutrition and overnutrition. Und
Suppose that a portion of double-stranded DNA in the middle of a large gene is being transcribed by an RNA polymerase. As the polymerase moves through the sequence of six bases sho
Delimitation and Limitation: There may be many aspects of the problem that need to be explored, but it is difficult to cover all aspects in a single research study bec
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