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What observations do you need to expect if starch is present when testing leaf for starch?
It can be observed that when testing for starch their must be a olour change of blue black after iodine solution was added.Before the colour change was green that changed to blue black of the whole procedure is been carried out.
What effect does iodine have when added directly to a leaf in an experiment?
it becomes blue black showing that starch is present.
What areas on a variegated leaf change colour?
in a variegated leaf only the green areas of the leaf turns blue black in colour when tested for starch what is the best way to explan that
Why did the leaf turn brittle in testing a leaf for starch?
The leaf turns brittle during the testing the leaf for starch because the ethanol extracts the all water content from the leaf.
What does the presence of blue color means in variegated leaf experiment of photosynthesis?
By blue color I assume you mean an added dye that shows how some parts of the leaf can photosynthesize and others not. The easiest of these experiments is to place the leaf in boiling ethanol (alcohol) and when drained of colour spread out on a flat surface. Soak the leaf in iodine and the green parts will turn blue/black and the non green parts will stay the yellowish brown colour of iodine. The green parts contain starch (a more compact form of glucose) which makes iodine turn blue/black. The blue/black is what will show starch is present.
What is the color of the leaf at the end of the experiment that test for starch?
the color of the leaf become brown-black after the iodine solution was added.
What observations do you need to expect if starch is present when testing leaf for starch?
It can be observed that when testing for starch their must be a olour change of blue black after iodine solution was added.Before the colour change was green that changed to blue black of the whole procedure is been carried out.
When poured iodine on leaf why it changes?
If you add iodine to a leaf, a black color will show that starch is present
Why is the color of leaf became dark blue after using the iodine solution is that means the leaf is healthy and have more starch?
because of the presence of starch
Why did the leaf turn blue black when iodine was added in the starch test?
because photosynthesis has occured in the leaf. starch is produced and turns iodine blue-black indicating the presence of starch.
Where is starch stored in a variegated Coleus leaf?
The starch in a variegated Coleus leaf is stored in the pigmented parts of the leaf. Coleus is a flowering plant is usually considered an ornamental plant because of its color.
Why does a leaf bug change its color?
Leaf bigs change their color so that they can conceal themselves from predatory animals
What is the colour of the non-green parts of a leaf after a starch test?
When conducting a starch test green and non-green leaves will react differently. Non-green leaves will not change color, remaining the same. However, green leaves will darken to black or nearly black color.
What effect does iodine have when added directly to a leaf in an experiment?
it becomes blue black showing that starch is present.
Why do green leaves turn blue black when iodine is added?
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
How is starch produced in the leaf?
When the plant is kept in sunlight the starch is formed in leaf.
When the leaf color changes in autum is it a physical change or chemical change?
It is a chemical change, a degradation of the compounds from the leaf.
