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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.
Determine the uses of Iron - Soil Iron is a constituent of cytochromes, haem and non-haem enzymes. It is also essential for chlorophyll formation though is not a part of it. It
Phylum Bryophyta The Bryophytes include the mosses and their close relatives. They are widely diverse and grow in a variety of place. 1) Life cycle shows alternation of gene
Define about the nutritional deficiencies? The nutritional deficiencies which have been identified in the group of elderly are of total calories, protein, vitamin A, vitamin C,
Explain the term - Seashore Rhythm Test This test consists of 30 pairs of rhythmic patterns. The task is to judge whether the two members of each pair are the same or different
Define Pre-Exercise or Pre-Event Meal for athletes? Suitable foods in adequate quantities at all times should be consumed but before the event, strategies to fuel up the energ
State in brief about the Fungi It is heterotrophic plants, larger than the bacteria. Those that live on the dead tissues of organic substances are called saprophytic. They pla
Your client has the flu and reports 5-6 loose stools a day. He has experienced an isotonic fluid volume loss. Explain what an isotonic fluid loss means.
Mechanisms of different species of animal In an animal when the need to change the focal power of the eye arises, different mechanisms are there in different species of animal
Define each term and give an example of an application that uses the following: a. Biocompatible material b. Biodegradable material c. Biomimetic
what are the role of microbes in human welfare
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