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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.
Explain the Factors Influencing RS Content -Amylose or Amylopectiz ratio? Amylose/Amylopectirz ratio: In general, foods containing high amylose/amylopectin ratio lead to higher
BRONCHUS - In thorax trachea is devided in to 2 bronchi that enter into lungs of its own side. Rings present in it. BRONCHIOLES - These are branches of bronchus.
Osmosis and transpiration both play a part in the movement of water through a plant. Which of these two processes makes the greater contribution to the movement of water up the t
Q. show the Symptoms of constipation? Have you ever suffered from constipation? Do you recall the symptoms associated with the problem? Yes, the symptoms were specific to havin
Enumerate about the Mycotic Infections Invasion of the nervous system by a fungus is known as a mycotic infection. A fungus is any member of a large group of lower plants (in s
why excretory organ of prawn is called green gland?
Determine the term Clade? In cladistic taxonomy, how groups of animals are related to each other. It includes the ancestral group and all of the other groups, or lineages, of a
Transplantation - Clonal Propagation The shoots or plantlets multiplied on a medium containing organic nutrients, show poor photosynthetic capability. Moreover, in these pla
Chordal Sparing Operation : For sparing both leaflets, an incision is made on the anterior leaflet close to the annulus and then extended centrally and the two segments,
“Define nosocomial infections. Discuss the factors that might influence whether a patient may acquire nosocomial infection. How might these risks be reduced?”
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