Advertisements
Advertisements
प्रश्न
What would happen if all the green plants disappear from the earth?
उत्तर
Green plants provide food and oxygen to all other living organisms. If they disappear from the Earth, all other organisms will die due to starvation and lack of oxygen for respiration.
APPEARS IN
संबंधित प्रश्न
List the differences between aerobic and anaerobic respiration.
Trace the movement of oxygenated blood in the body.
The trachea divides into tow tubes at its lower end. What is the name of these tubes?
What organs are attached to the two bronchi?
State whether the following statement is true or false:
Fish and earthworm exchange gases during respiration in the same way.
Explain why, a land plant may die if its roots remain waterlogged for a long time.
Define breathing. State the differences between breathing and respiration.
Describe the process of respiration in the following part of a plant:
Root
Name the energy currency in the living organisms. When and where is it produced?
What is the function of the respiratory system?
Some sugar solution is taken in a test-tube and a little of substance X in powder form is added to it. The mouth of test-tube is closed with a cork and allowed to stand for sometime. On opening the cork, a characteristic smell of substance Y is obtained and a gas Z is also observed to be formed. The gas Z extinguishes a burning matchstick.
(a) What could be (i) X, (ii) Y, and (iii) Z?
(b) What is the process of converting sugar into substance Y by the action of X known as?
(c) What type of respiration is exhibited by X in the above process?
When a person breathes in the air, the air enters into his body through an organ A having two holes B in it. The air then passes through the pharynx and larynx and enters into tube C. The tube C divides into two smaller tubes D at its lower end. The two smaller tubes are attached to two respiratory organs E. Each smaller tube divides inside the organs E to form a large number of still smaller tubes called F. The smallest tubes F have air-sacs G at their ends in which gaseous exchange takes place in the body of the person. What are A, B, C, D, E, F, and G?
There is a pair of bean-shaped organs P in the human body towards the back, just above the waist. A waste product Q formed by the decomposition of unused proteins in the liver is brought into organ P through blood by an artery R. The numerous tiny filters S present in organ P clean the dirty blood by removing the waste product Q. The clean blood goes into circulation through a vein T. The waste substance Q, other waste salts, and excess water form a yellowish liquid U which goes from organ P into a bag-like structure V through two tubes W. This liquid is then thrown out of the body through a tube X.
(a) What is (i) organ P, and (ii) waste substance Q?
(b) Name (i) artery R, and (ii) vein T.
(c) What are tiny filters S known as?
(d) Name (i) liquid U (ii) structure V (iii) tubes W, and (iv) tube X.
A student has set up "CO2 is released during respiration”. After about 1 hour he observes no change in the water level in the delivery tube. Write two possible resons for the failure of the experiment.
Choose the odd one out in each of the following groups of four items each:
Oxyhaemoglobin, Carbaminohaemoglobin, Hypoxia, Carboxyhaemoglobin
Respiration refers to ____________.
Which of the following statement(s) is (are) true about respiration?
- During inhalation, ribs move inward and the diaphragm is raised
- In the alveoli, exchange of gases takes place i.e., oxygen from alveolar air diffuses into blood and carbon dioxide from the blood into the alveolar air
- Haemoglobin has a greater affinity for carbon dioxide than oxygen
- Alveoli increase surface area for the exchange of gases
Which of the following equations is the summary of photosynthesis?
Sometimes when we do heavy exercise, anaerobic respiration takes place in our muscle cells. What is produced during this process?
The oxygen dissociation curve is a sigmoid curve and it shifts towards the right due to ______.
