Advertisements
Advertisements
प्रश्न
How would you test the presence of starch in leaves?
Advertisements
उत्तर
Experiment to test the presence of starch in leaves:
- Take two healthy green potted plants of the same type.
- Keep one potted plant in a dark room for one or two days in order to remove all the starch from the leaves.
- Keep the other plant in sunlight.
- Now, take one leaf from each potted plant and put a few drops of iodine solution on them.
- Note down the change in the colour of both the leaves.
- Observation: No blue-black colour will be observed on the leaves of the plant kept in the dark room. This indicates the absence of starch. Blue-black colour will be observed on the leaves of the plant kept in sunlight. This indicates the presence of starch.
- Concept insight: Plants prepare glucose during photosynthesis which gets stored in plants in the form of starch. Iodine turns blue-black when reacted with starch.
APPEARS IN
संबंधित प्रश्न
Explain the following term with an example:
Carnivore
Spot the following in the table of vitamins and minerals.
Foods required to prevent the above diseases.
Very Short Answer Type Questions:
Name two sources of proteins provided by animals.
Which of the following statement (s) is (are) true about the heart?
- Left atrium receives oxygenated blood from different parts of the body while the right atrium receives deoxygenated blood from the lungs
- Left ventricle pumps oxygenated blood to different body parts while the right ventricle pumps deoxygenated blood to the lungs
- Left atrium transfers oxygenated blood to the right ventricle which sends it to different body parts
- Left atrium transfers oxygenated blood to the right ventricle which sends it to different body parts
Explain the process of nutrition in Amoeba.
Organisms that prepare food for themselves using simple naturally available raw materials are referred to as ______.
Fill in the blanks of the paragraph given below with the words provided in the box.
| chlorophyll, energy, food, carbon dioxide, water, photosynthesis |
Leaves have a green pigment called ___(a)___ which captures ___(b)___ from sunlight. This ___(c)___ is used in the process of ___(d)___ and along with other raw materials like ___(e)___ and ___(f)___ synthesize ___(f)___.
Can you give me a name?
Solve the following riddles by writing the name of the organism and its mode of nutrition. One riddle is solved to help you.
I am tall but I cannot move. I am green and can prepare my own food. ______, ______
Mention two components of food that do not provide nutrients.
