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The number of plant species recorded from India, is

A
30,000

B
45,000

C
70,000

D
90,000

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(b) The flora of India is one of the richest of the world due to a wide range of climate, topology and environments in the country. It is thought there are over 17,500 species of flowering plants in India. India covers more than 45,000 species of flora, out of which there are several species that are not found anywhere else. Since ancient times, use of plants as a source of medicines has been the inherent part of life in India. There are more than 3000 officially documented plants in India that holds great medicinal potential. India comprises seven percent of world's flora.
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Interconversion of p-Glucose Forms A solution of one stereoisomer of a given monosaccharide rotates planepolarized light to the left (counterclockwise) and is called the levorotatory isomer, designated the other stereoisomer rotates plane-polarized light to the same extent but to the right (clockwise) and is called the dextrorotatory isomer, designated An equimolar mixture of the and forms does not rotate plane-polarized light.The optical activity of a stereoisomer is expressed quantitatively by its optical rotation, the number of degrees by which plane-polarized light is rotated on passage through a given path length of a solution of the compound at a given concentration. The specific rotation of an optically active compound is defined thus:The temperature and the wavelength of the light employed (usually the b line of sodium, 589 nm) must be specified in the definition.A freshly prepared solution of -D-glucose shows a specific rotation of . Over time, the rotation of the solution gradually decreases and reaches an equilibrium value corresponding to In contrast, a freshly prepared solution of -glucose has a specific rotation of The rotation of this solution increases over time to the same equilibrium value as that shown by the anomer.(a) Draw the Haworth perspective formulas of the and forms of -glucose. What feature distinguishes the two forms?(b) Why does the specific rotation of a freshly prepared solution of the form gradually decrease with time? Why do solutions of the and forms reach the same specific rotation at equilibrium?(c) Calculate the percentage of each of the two forms of -glucose present at equilibrium.
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Question Text
The number of plant species recorded from India, is
TopicBiodiversity and Conservation
SubjectBiology
ClassClass 12
Answer TypeText solution:1
Upvotes132