Answer : B) In step 2, there was a chemical change which was observed in sugar.
Explanation : In A step 2 there was a physical change that was seen. By just boiling the dissolved salt solution salt was obtained. Therefore, it is a physical change. In B step 2 there was a chemical change seen as sugar solution was thickened and turned brown. It was not obtained in its original form; there was a chemical reaction that took place during sugar evaporation. As chemical change is the one where the reaction is irreversible.
Therefore only in B step 2 there was a chemical change that was observed.
The correct answer is option A. which states that the two functions of carbohydrates in plants are structural support and energy storage.
- Cellulose is a polysaccharide which is made up of numerous glucose chains linked to each other.
- It's main function is to provide a structural rigidity and support to the plants. It is also a constituent of the cell wall.
- Starch is another polysaccharide which is serves as the primary source of food and energy for living beings.
- Plants produce sugar through the process of photosynthesis using sunlight, carbon dioxide and water which is stored in the form of starch in plants.
Hence, the correct answer is option A. the two functions of carbohydrates in plants are structural support and energy storage.
Learn more about carbohydrates here:
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Can you please show the answer choices to pick from?