What will happen if leaves of plants are covered with Vaseline?

Coating the leaves of a potted plant with Vaseline will block the stomata and plant will get unhealthy due to the following reason: There will be no gaseous exchange. Vaseline layer hinders from receiving sunlight and affects the process of photosynthesis. No transpiration will take place and the plant will die.

What is the purpose of leaving the potted plants in the dark for 48 hours?

The purpose of keeping the plant in dark room is: To activate the chloroplast in the plant. To activate the enzyme in the leaves. To increase the release of O2.

What happens when a leaf covered with Vaseline is tested for starch?

If leaf is covered by vaseline then its stomata are get closed or blocked. and therefore it will not remain healthy for a long time. This is because plant will not get oxygen for respiration. it will not get carbon dioxide for photosynthesis.

What happens if you cover a leaf with black paper?

If the plant’s leaves are covered with black paper the imp process for the life of plant i.e. photosynthesis will not occur in that area (leaves). If all the leaves are covered as such then the plant will ultimately go to senescence i.e. death.

Will petroleum jelly hurt plants?

Why vaseline will kill your plant When you cover up the leaves of a plant with vaseline, you will block these pores of the plant. Transpiration (water loss through leaves) Respiration (oxygen uptake through leaves) Photosynthesis (carbon dioxide uptake through leaves)

What is the main function of the leaf?

The main function of a leaf is to produce food for the plant by photosynthesis. Chlorophyll, the substance that gives plants their characteristic green colour, absorbs light energy.

What is the purpose of putting the plant in darkness for two days?

Periods of darkness are required for plants as it affects their metabolism. It also gives them time to stop producing food (photosynthesis) and use the huge amount of energy they’ve stored through the day to grow.

What will happen if the leaf having the above structure is covered with vaseline on both sides give two points in support for your answer?

The leaves of a healthy plant coated with vaseline will not remain healthy because the vaseline coating will block the stomata. As a result, The plant would not get oxygen for respiration. It would not get carbon dioxide to carry out photosynthesis.

What is the function of vaseline on leaves?

The petroleum jelly blocks the stomata, so that water cannot escape from the leaf. Students may have observed some moisture in the bag containing the covered leaf. If so, the leaf was not entirely sealed off by the petroleum jelly.

What happens to a leaf in the dark?

Without light, plants are not able to perform photosynthesis. When a plant is kept in a dark room, it will be unable to perform photosynthesis. Without photosynthesis, the plant will not be able to make its own food and the plant will slowly die.

Will a leaf taken from a potted plant kept in a dark room?

Answer : No, a leaf from a potted plant will not turn blue black showing that no starch is present, because the leaf did not get sunlight and it could not make fresh starch food. So, it is necessary for photosynthesis to take place so that starch can be synthesized.

What will happen if vaseline is applied to the under surface of a dicot leaf?

The correct answer is Experimental leaf 2. Loss of water to the air through evaporation from the leaves is called transpiration. On Experimental leaf 2, Vaseline was applied underneath the leaf, thus stomata get completely blocked thereby preventing transpiration. Hence it’ll dry up last.

How to test leaves for the presence of starch?

Iodine solution is used to test leaves for the presence of starch. You need to: heat a plant leaf in boiling water for 30 seconds (this kills the leaf, stopping any chemical reactions)

What would happen if the plant is kept in dark for 48 hours?

Remove starch from the experimental leaf. Putting the plant in dark for 48 hours would stop the process of photosynthesis as light is required for it. Photosynthesis produces organic sugars which are stored in form of starch in plants.

How long can a potted plant be kept in the dark?

A potted plant was kept in the dark for 48 hours. Two leaves X and Y were treated as shown in the diagram below. Get premium membership and access questions with answers, video lessons as well as revision papers. A potted plant was kept in the dark for 48 hours.

How do you make a leaf starchless?

Remove starch from the experimental leaf. Putting the plant in dark for 48 hours would stop the process of photosynthesis as light is required for it. Photosynthesis produces organic sugars which are stored in form of starch in plants. The absence of photosynthesis would lead to consumption of all stored starch making the leaf starchless.