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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.
Question 1 Discuss briefly the collection and examination of pericardial fluid Question 2 Discuss the following Collection of CSF Physical examination of CSF
What is the indolacetic acid (IAA)? IAA or Indolacetic acid (indolyl-3-acetic acid) is the major natural auxin made by plants. It promotes plant growth and cellular differentia
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NatURAL SELECTION IN BIOLOGY
structure explanation of unit membrane model
Is cell division happening during the entire cell cycle? What is interphase? Cell division properly happens during the mitotic phase of the cell cycle. During interphase proces
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Q. What do you mean by Transition Period? The transition period from the Renaissance to the Modern period produced many notable workers and much literature. Botanists gradually
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