Q8. Observe the experiment and answer the following questions -Boiling water Leaf boiled in water Step 2 -Alcohol Leaf transferred in a test tube containing alcohol Step 3 Blue-black Water Leaf Step 1 Gently heat water to make alcohol boil Step 4 Leaf washed in tap water Step 5 Drops of solution added Step 6 (a) What does the above experiment prove? (b) Name the solution used for the test. (c) What is the substance stored by the plant's leaf?
Attachments:
Answers
Answered by
43
Answer:
(a)
Explanation:
(a) The above experiment proves the presence of starch in leaves.
(b) The solution used for the test is Iodine.
(c) The substance stored by the plant leaves is starch.
Answered by
0
Answer:
This experiment is to test the presence of starch.
Explanation:
- The experiment proves the presence of starch in leaves
- The solution used is iodine to detect starch
- The leaf stores starch as a source of energy
- Plants consume starch, a white, powdery material made of glucose, as sustenance.
- While hot water kills the leaf, alcohol degrades chlorophyll. The leaf is no longer green as a result.
- One of the leaves changes to a blue-black colour after being exposed to iodine because starch is present and iodine serves as an indication.
- The colour of the other leaf changes to a reddish-brown hue.
- The leaf that was exposed to light changes colour from green to blue-black, suggesting that it has been undergoing photosynthesis and making starch.
The existence of starch in leaves serves as sufficient proof that photosynthesis occurs in leaves because starch creation requires photosynthesis.
#SPJ2
Similar questions