e88 7. If ade-shelled chicken egg containing 20% solutes is placed in a 30% sucr
ID: 199509 • Letter: E
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e88 7. If ade-shelled chicken egg containing 20% solutes is placed in a 30% sucrose solution, wha will happen to the weght of the and why? 8. What do photosynthetic cells require in order to transform light energy into chemical energy? 9. An Elodea plant is placed in water containing the indicator phenol red. Carbon dioxide is then added to the water is placed in a dark room. After one hour, what color do you expect the indicator solution to be, and why 10. What is the ultimate source of energy for life for nearly all living organisms on Earth?Explanation / Answer
7. The answer is the weight of egg will reduce because of exo osmosis. As the out environment is high concentrated the water from egg moves towards the outer environment results the loss in weight.
8. In order to tranform the light energy to chemcal energy the photosynthetic cell should posses either chloroplast or chromophore. Chloroplast or chromophore contains chlorophyll which plays a main role in the energy transformation.
9. There wont be no change. The phenol red is an indicator, if the pH of the solution is above 8.2 it turns in to red in acidic conditons at below 6.8 it truns in to yellow. When the carbon dioxide is availab, it turns in to yellow due to low pH. In the absence of light plant cannot perform photosynthesis so the CO2 not to be utilized so, there won't be no change in the indicator color.
10. The ultimate soucre of energy on the earth is Sun.
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