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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.
compare and contrast plant cell and animal cell with labeling diagrams
Give number of valence electrons for technetium. Write out electronic configuration for the valence electrons. Give the number of valence electrons and the number of electronic con
Nutrition, Feeding, Digestion All organisms require a fairly steady supply of nutrient materials from the environment to obtain energy in order to stay alive. The animals are
describe the function of a bacterial flagellum
S e c t i o ned and Formed Meats These are technically speaking restructured products, since they are partially disassembled and then reassembled to form products resembl
Lack of iron in the photic zone of the ocean restricts the size of plankton population.Iron is what kind of factor for marine plankton?
What are the processes involved in the preparation of plant tissue for free hand sectioning?
1. Name four experimental techniques to determine protein-protein interactions other than X-ray & NMR techniques. 2. How common are Coiled-coil motifs? Where are they found? Giv
Define the Role of Vitamin D in the immune system? Immune responses that are, mediated by T-cells can be inhibited by tile large doses of calcitriol i.e. 1, 25 dihydroxycholec
Fertilisation: Fertilisation is the process of fusion of male and female gametes. For fusion of male and female gametes, pollen grains have to reach the surface of the stigm
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