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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 various methods of blood collection in a laboratory. Add a note on collection of blood by using vacutainers. Make a table indicating the color of vacutainer tub
Explain the Chemotherapeautic rinses Chemotherapeautic rinses: The use of 0.12 per cent chlorhexidine has been proven to be of therapeutic significance in maintaining period
Coxal Glands There is a pair of coxal glands, in almost all the segments in Onychophora (Peripatus). Developmentally; in every segment a hollow follicle or somite arises and i
structure of oxysome
Q. What are biogeochemical cycles? The Biogeochemical cycles are representations of the circulation and recycling of matter in nature. The major biogeochemical cycles studie
TYPES OF PLASTIDS (1 ) LEUCOPLASTS These are present in ground parts of plants, internal parts of herbaceous stems and deep tissues of plants where sun light is not avail
how do viruses reproduce
Angiosperms are the flowering plants. They first appeared at least 110 million years ago from the unknown gymnosperm ancestor, these flowering plants have risen to dominance in th
Specific Guidelines Physician's orders Each order should have the date and time it was written. Some way of indicating which orders have been carried out is nece
Carbon Based Materials These include Pyrolytic carbon, polycrystalline (Vitreous Carbon), and carbon/silicon interstitial combination. Vitreous Carbon -Solid or porous vitre
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