Biology

Biology, 25.07.2019 13:30, xxnomr3cyxx

How can the starch test show that food has been prepared bin the leaf?

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Biology, 30.06.2019 20:00, babycakes08d

Nan experiment two potted plants, labeled plant 1 and plant 2, are placed in transparent plastic bags and left in the open. sodium hydrogen carbonate is added to the bag covering plant 1. this compound decomposes slowly to produce carbon dioxide. soda lime is added to the bag covering plant 2. this compound absorbs carbon dioxide. both plants are watered regularly with the same amount of water. after several days, starch test results indicate starch in leaf 1 but an absence of starch in leaf 2.this experimental data confirms the

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Biology, 01.08.2019 08:30, barkahigh8089

An iodine test of a tomato plant leaf revealed that starch was present at 5: 00 p.m. on a sunny afternoon in july. when a similar leaf from the same tomato plant was tested with iodine at 6: 00 a.m. the next morning, the test indicated that less starch was present in this leaf than in the leaf tested the day before. this reduction in starch content occurred because starch was

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Biology, 10.10.2019 00:00, crowntinyy3408

In an experiment two potted plants, labeled plant 1 and plant 2, are placed in transparent plastic bags and left in the open. sodium hydrogen carbonate is added to the bag covering plant 1. this compound decomposes slowly to produce carbon dioxide. soda lime is added to the bag covering plant 2. this compound absorbs carbon dioxide. both plants are watered regularly with the same amount of water. after several days, starch test results indicate starch in leaf 1 but an absence of starch in leaf 2. this experimental data confirms the a) role of water in photosynthesis. b) role of sunlight in photosynthesis. c) role of nutrients in photosynthesis. d) role of carbon dioxide in photosynthesis.

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Biology, 28.10.2019 21:31, reeseleprell4141

Astudent performed an experiment to demonstrate that a plant needs chlorophyll for photosynthesis. he used plants that had green leaves with white areas. after exposing the plants to sunlight, he removed a leaf from each plant and processed the leaves to remove the chlorophyll. he then tested each leaf for the presence of starch. starch was found in the area of the leaf that was green, and no starch was found in the area of the leaf that was white. he concluded that chlorophyll is necessary for photosynthesis. which statement represents an assumption the student had to make in order to draw this conclusion? (1) starch is synthesized from the glucose produced in the green areas of the leaf. (2) starch is converted to chlorophyll in the green areas of the leaf. (3) the white areas of the leaf do not have cells. (4) the green areas of the leaf are heterotrophic.

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