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Cohesion-adhesion theory describes the properties of water which help move it through the plant. Cohesion is the property of water molecules to stick together (held by hydrogen bonds), forming the column of water extending from the roots to the leaves; adhesion is the propert of water molecules to stick to the cellulose in plant cell walls, counteracting the force of gravity and serving to rise the column of water.
Q. Besides vertebrates two invertebrate phyla contain species that make pulmonary respiration. Which are these phyla? Terrestrial molluscs and the arachnid arthropods are the i
Phylum Chlorophyta (green algae) 1) The chlorophyll is the main photosynthetic pigment. 2) There is little or no cell differention in thallus. Thallus is usually filamento
Distinct types of proteins Two distinct types of proteins are known: fibrous and globular proteins. Fibrous proteins are insoluble in water and are physically tough, which
Explain about the cyclamate - artificial sweeteners? Another sweetener is cyclamate (sodium cyclohexylsulphamate). Have a look at its structure as shown in the figure. It is on
Q. Are there any bacteria made of more than one cell? There are no pluricellular bacteria. All bacteria are unicellular prokaryotic.
how mollusca bore into hard substrate
While discussing the Darwinian premise of natural selection we observed that the term selection is synonymous with non-random reproduction, and that the success of the survivors is
What are the soil-forming factors There are many degrees or variations of soil-forming factors, and the potential for creating different kinds of soil is enormous. However, whe
The following histograms were produced using flow cytometry after labelling B-cell lymphocytes with propidium iodide. Histogram A is from a healthy individual while Histogram B is
Explain Fungi - Nutritional Types of Microorganisms? Fungi are filamentous, eukaryotic microorganisms, ubiquitous in nature. These grow best in dark and moist habitats. Their h
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