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Question 3: Which plant hormone makes a stem (or shoot) bend towards light?

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Answer: Auxin is a plant hormone which makes a stem (or shoot) bend towards light sources.
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10.2.1 Image Formation by Spherical Mirrors You have studied aboir i tue image formation by plane mirrors. You also know the rhature position and relative sise of the images formed by them. How about the images formied by spherical mirrors? How can we locate the image formed by a concave inurror for dilferent postions of the object? dre the images real or virtual? Are they enlarged. diminished or have the same sine? Wo shall esplore this with an Activity. Activltý You have already fearnt a gay of determiningsthe focal length of a comsave mitror in Antivity 10.2, you have seen that the sharp bright Not of light you ot on the paper is, Ln fich, the image of the Sun. It Was ix tiny. real inested inage You 3 gh the approximate focal lengh po the eonctive mitror by meisurang the distance of the tmase from ine iniron, - Trabe a conceve mirene bind out is approximate focal length in thr way deseribed above. Note down the value of focal length. (You can also tind it out by obraingng limage of a distant object on a sheet of papers 4. Mark a line on a Tabie with a chalk. Place the concave mirror on a ramd. Place the atind over the fine such that its pole lies over the line. - Draw with a chalk two more limes parallel to the previous line such that the distimce betwen any cwo successive lines is equal to the focal length of the mirror. These lines will now correspond to the postitions of the points P. F and C, respectively. Remember For a spherical mumar of small aperture. the principal focus lies mid-enay betweers the pole P anch the centre of curvature C. * Keep a bright object, say a burning candle, at a pasition far beyond C. Place a paper sereen and mose it in front of the mirror till you obtain a sharp bright imase of the candle flame on it. - Observe the imase carefilly, Note down its nature, position and relatlve size with respect to the object size. - Repeat the activity by placing the candle - (a) just beyond , (b) at C. (c) between and . (d) at , and (e) between and . a In ore of the cases, you may not get the image on the sereen. idenaify the position of the object in such a case. Then, look for its virtual image in the mirror itself. - Note down and tabulate your observations.
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Question Text
Question 3: Which plant hormone makes a stem (or shoot) bend towards light?
TopicControl and Coordination
SubjectScience
ClassClass 10
Answer TypeText solution:1
Upvotes50