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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.
Atopic dermatitis is an inflammatory skin disease. This disease is observed frequently in young children. There will be skin eruptions.
what happens to your total peripheral resistance when you go from a warm room to cool outside air
What is normal bone physiology An insight into the normal bone physiology and its adaptation by modeling and remodelling process to functional stresses is also of importance. I
Pericardial Window Through Left Antero Lateral Thoracotomy : A small left antero lateral thoracotomy is done through the 5"' intercostal space. A pericardial windo
ENTROP Y - Transfer of energy takes place from high energy level to low energy level. Rudol f clausius gave this term. During it there is collision of particles, r
Which are the plant tissues that cover the stem and the leaves? The stem may be enclosed by epidermis (having stomata, cuticle and photosynthetic cells) as in monocots or, alte
Secondary Induction The two primary inductive events that we have described so far are significant in the patterning of early embryo. But there are another such signaling eve
what is the biological significance of skeleton
How many chambers do the bird heart and the mammalian heart have? Concerning temperature maintenance what is the advantage of the double and complete circulation of these animals?
Q. Mammal identity card. How are mammals characterized according to examples of representing beings, skin, respiration, nitrogen waste, basic morphology, circulation, thermal contr
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