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Question
Who proposed that the upward and downward movement of food take place in plants?
Who proposed that the upward and downward movement of food take place in plants?
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Solution
The correct option is B Curtis
Prepared food is transported as soluble sugars from a region of higher concentration i.e., preparation site to a region of lower concentration i.e., storage site or the site, where sugars are used up. The direction can be upwards, downwards or radial. Curtis determined this fact with the help of his ringing experiments. In order to determine whether the carbohydrates move up to the growing points through the xylem with the water or through the phloem, large numbers of twigs of several different species of woody plants were ringed by Curtis. His experiments proved the currently accepted view about transportation of soluble sugars in plants.So, the correct answer is option D.
Prepared food is transported as soluble sugars from a region of higher concentration i.e., preparation site to a region of lower concentration i.e., storage site or the site, where sugars are used up. The direction can be upwards, downwards or radial. Curtis determined this fact with the help of his ringing experiments. In order to determine whether the carbohydrates move up to the growing points through the xylem with the water or through the phloem, large numbers of twigs of several different species of woody plants were ringed by Curtis. His experiments proved the currently accepted view about transportation of soluble sugars in plants.
So, the correct answer is option D.
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