Advertisements
Advertisements
प्रश्न
Out of xylem and phloem, which one carries materials upwards as well as downwards?
Advertisements
उत्तर
Phloem carries materials both upwards as well as downwards.
APPEARS IN
संबंधित प्रश्न
What are the different ways in which glucose is oxidized to provide energy in various organisms?
Name the process by which plant parts like roots, stems, and leaves get oxygen required for respiration.
State whether the following statement is true or false:
Fish and earthworm exchange gases during respiration in the same way.
Fill in the following blank with suitable word:
The actual exchange of gases takes place in the ___________ of the lungs.
Explain why, a land plant may die if its roots remain waterlogged for a long time.
Explain why, it is dangerous to inhale air containing carbon monoxide.
From where do the aquatic animals and terrestrial animals obtain oxygen for breathing and respiration?
Explain how, it would benefit deep sea divers if humans also had gills.
In cockroaches, air enters the body through:
There are five animals P, Q, R, S and T. The animal P always lives in water and has gills for breathing. The animal Q can stay in water as well as on land and can breathe both, through moist skin and lungs. The animal R lives in soil and breathes only through its skin. The animal S lives on land and breathes through spiracles and tracheae. And animal T lives in water and breathes through its cell membrane.
(a) Which of the animals could be Amoeba?
(b) Which of the animals could be frog?
(c) Which animal could be fish?
(d) Which animal could be grasshopper?
(e) Which animal could be earthworm?
Consider the following chemical reactions which take place in different organisms/tissues under various conditions:
(i) Glucose → Respiration ">Ethanol + Carbon dioxide + Energy
(ii) Glucose→ Respiration ">Carbon dioxide + Water + Energy
(iii) Glucose → Respiration "> Lactic acid + Energy
(a) Name one organism which respires according to equation (i) above.
(b) Name one organism which respires according to equation (ii) above.
(c) When and where does respiration represented by equation (iii) above take place?
(d) Which equation/equations represent aerobic respiration?
(e) Which equation/equations represent anaerobic respiration?
(f) Which of the above reactions produces the maximum amount of energy?
An organism X having breathing organs A lives on land. When organism X goes underwater, it cannot survive for a long time unless carrying an oxygen cylinder. On the other hand, the organism Y having breathing organs B always lives in water and if taken out of the water, it dies after a short while. A third organism Z having breathing organs C and D which lives on the banks of ponds, lakes, and rivers can survive on land as well as in water equally well.
(a) What could organism X be? Name the breathing organs A.
(b) What could organism Y be? Name the breathing organs B.
(c) What could organism Z be? Name the breathing organs C and D.
(d) Out of X, Y, and Z, which organism is (i) amphibian, (ii) aquatic, and (iii)
terrestrial?
Answer this question.
Name the organ of respiration in fishes.
Answer the following in one word.
What is the muscular sheet below the lungs called?
Choose the odd one out in the following groups of four items each:
Diffusion, Respiratory gases, Alveoli, Capillary network
Name the body structure concerned with the given functional activity:
Prevents food from entering the trachea during swallowing.
With regard to the respiratory system and the process of respiration in man, answer the following question :
Give the overall chemical equation to represent the process of respiration in humans.
Rewrite the following statement by selecting the correct option.
During respiration, ____________ gas is given out.
Answer the following question.
A gas is released during photosynthesis. Name the gas and also state the way by which the gas is evolved.
______ refers to the physical process by which gaseous exchange takes place between the atmosphere and the lungs.
