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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.
We now understand that mutations that cause the inhibition of apoptosis are found in tumors. Because proliferation itself is not induced by the inhibition of apoptosis, explain how
What is determined by tube feet? Hollow and fluid-filled tubes which are part of the water vascular system in Echinoderms. Muscles associated with tube feet allow them to be hy
Biotechnological applications of enzymes Although enzymes have been used in certain industrial processes for centuries, their precise role or even their identity was not known
Q. What are the vessels that carry blood to the kidneys? Is this blood venous or arterial? The renal arteries are ramifications of the aorta and so the blood filtered by the ki
Determine condensation foam method In the condensation method a pressurized solution is suddenly released to expand the number of gas bubbles which their ripe through the liqu
Q. Causes of Malnutrition in Inflammatory Bowel Disease? The causes of malnutrition include: • Decreased oral intake, which can be disease induced due to abdominal pain, dia
defination
Q What are the differences and similarities between the transcription process and the replication processes? A DNA polynucleotide chain serves up as a template in the replication (
Side Efleects of Antipsychotic Drugs: The most common side effects are symptoms of central nervous system i.e. Extrapyramidal Symptoms (EPS) including such as: Parkinso
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
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