Question: Why Are Variegated Leaves Selected In The Experiment?

What is the aim of testing a leaf for starch?

In the leaf, excess glucose is rapidly converted to starch, so we test leaves for starch to show that photosynthesis has happened, rather than testing for glucose.

We often indicate that light and chlorophyll are required for the process by adding them to the equation near the arrow..

Why is a variegated leaf used in both the main and control experiment?

For easier observation, we use the variegated leaf, as it contains both the chlorophyll containing and yellow parts. So, we can test in the same leaf that food is formed only in parts of the leaf containing chlorophyll and not in parts not containing chlorophyll.

Can I make my plant variegated?

A. Variegation is not easily induced and can’t be done so at home. Best to get a cutting of a variegated plant from a friend or pass your’s on in order to keep the variegated plant love flowing.

Why was a variegated leaf used in this experiment?

Uses. A variegated leaf is useful in conducting experiments to show that chlorophyll is needed for photosynthesis to happen.

What is variegated leaf give example?

The green part of such a leaf contains chlorophyll but the white part of such a leaf does not contain chlorophyll. The leaves which are partly green and partly white are called ‘variegated leaves’. The plants such as croton and coleus have variegated leaves which are partly green and partly white.

Which solution is used to test the presence of chlorophyll?

iodine solutionOnly the parts that were green become blue-black with iodine solution, showing the importance of chlorophyll in photosynthesis.

Why do variegated leaves grow slower?

Variegated regions lack chloroplasts so do not reflect green light. … They absorb enough light in the green areas for the plant to transform light energy to chemical energy and support the entire plant’s nonphotosynthetic parts but they may grow slower than an all green version of the plant.”

What does the half leaf experiment on photosynthesis indicate?

s half leaf experiment is used to prove that Options : light is necessary for photosynthesis. oxygen is evolved during photosynthesis. … s half leaf experiment is done to show that carbon dioxide is necessary for the photosynthesis to occur In this experiment Moll (inventor of experiment) divided. Moll.

Why are some leaves variegated?

Answer: Variation in leaf color arises because of a lack of the green pigment chlorophyll in some of the plant cells. … This applies both to green leaves with irregular markings (variegation), say in white and yellow, and to those of a single solid color such as gold or purple.

Do variegated leaves perform photosynthesis?

Leaves cannot perform photosynthesis without chlorophyll. Some plants have variegated leaves, with patterns of white and green. In these plants only the green parts of the leaf can photosynthesize, because the white parts have no chlorophyll.

What is the conclusion of testing a leaf for starch?

The leaves of the plant are now tested for the presence of starch. If starch is present, then it has been synthesized by photosynthesis. We can then conclude that the presence of starch indicates that photosynthesis has taken place.

How do you test a leaf for starch?

Starch testingIodine solution is used to test leaves for the presence of starch. … After a few minutes, the parts of the leaf that contain starch turn the iodine from brown to blue/black.The leaf on the left is a variegated leaf.More items…

Why do we dip the leaf in boiling water?

The hot water kills the leaf and the alcohol breaks down the chlorophyll, taking the green color out of the leaf. When you put iodine on the leaves, one of them will turn blue-black and the other will be a reddish-brown. Iodine is an indicator that turns blue-black in the presence of starch.

Why is a variegated leaf plant selected for the experiment to prove that chlorophyll is required for photosynthesis?

Explanation: Variegated leaf are taken for the experiment of chlorophyll because the the part of the leaf chlorophyll is present can be used for the experiment and the rest of the leaves can be used for the test result.

How do you Destarch a leaf?

Destarching a plant:Before carrying out any photosynthesis practical it is necessary to destarch the plant by placing it in the dark for at least 48 hours. … This step is important so you can be positive that any starch present at the end of the experiment has been produced during the experiment.More items…

What is the role of stomata present on the surface of leaves?

We all know that stomata are the tiny pores on the leaves which play a major role in the exchange of gases. The intake of carbon dioxide and the outgoing of oxygen both takes place through these pores. The respiration in leaves takes place through the tiny pores called stomata present on them.

Are variegated plants natural?

Pattern-Gene Variegation Sometimes called Pigmented or Natural Variegation, some variegated plants aren’t mutants at all, but rather are naturally patterned.

How do you encourage variegation in plants?

Place the plant in full sun to encourage variegation. Variegated plants need more sun than solid green plants because they don’t have as much chlorophyll to absorb sunlight. If you’re growing a variegated plant, leave it near a sunny window or a bright spot on your property so it absorbs enough sun to stay healthy.