because there is starch present
because the leaves have photosynthesized- glucose is produced. therefore, the excess glucose is converted to starch. The starch is then stored in the leaf-starch is what causes the "green" leaf to turn blue black, as iodine turns blue-black when it reacts with starch.:P
When the leaves fall down the supply of chlorophyll is stopped
When iodine is added to a leaf with no starch, the leaf will remain its original color (usually green). Iodine reacts with starch molecules, turning the leaf blue-black if starch is present.
I did this lab experiment in my biology class. When Lugol's indicator is added to glucose, it turns to a dark green colour for starch it turns black and for surcose it turns yellow.
Removing the green color from the leaf before testing iodine solution allows for a clearer observation of the starch present in the leaf. The green color of chlorophyll can mask the color change that indicates the presence of starch when iodine solution is added. By removing the green color, it is easier to identify and analyze the starch content in the leaf.
When starch is added to leaves, it disrupts the natural pigments responsible for leaf coloration, particularly chlorophyll, which gives leaves their green color. This interference can cause the leaves to lose their green color and change to a different color, depending on other remaining pigments present in the leaf.
Because it doesn't contain green pigment, chloroplast... Green leaves changes to blue-black due to present of starch in chloroplast.
sure. There are leaves which do not have any green in them. There are Orange and Red leaves
yes they should have green leaves. Green leaves are green because they have chlorophyll which is needed for flowers.
Green Leaves was created in 1838.
Leaves That Are Green was created in 1965.
A bug that's green as leaves and green like leaves