Q. The sieve tube cells are called sieve plates as they have

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Q. The non lignified region of vessel is

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Q. The movement of substances by using energy against concentration gradient is

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Q. For feeding purpose an aphid insert its stylets into

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Q. Xylem and phloem arranged in a form of ring around the region

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Q. In root hair cells energy for active transport provided by

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Q. The root area where maximum absorption of mineral and salts takes place is

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Q. Plant tissues responsible for providing mechanical support to plant is

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Q. As sieve tube cell gain its maturity, it lost its organelles except

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Q. The phloem vessel cannot be collapse as their walls are

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Q. Amino acids are formed in leaves when glucose reacts with

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Q. The process partially responsible for the life on earth is

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Q. Effective wavelength for photosynthesis is of color

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Q. The factor that affects the photosynthesis is

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Q. To destarch a plant the number of days it should be kept in darkness is

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Q. Starch is digested to maltose by

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Q. New protoplasm is formed by assimilation of

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Q. The concentration of carbon dioxide in atmosphere naturally is

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Q. For the occurrence of photosynthesis than sugar must be formed from

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Q. During photosynthesis radiant energy is converted into

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