Respiration in Lower Animals
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Amount of dissolved oxygen in water is fairly low compared to that in air
Aquatic organisms have a greater surface area than terrestrial ones
Aquatic organisms have a greater oxygen intake requirement than terrestrial ones
None of the above
Which of the following are the products of fermentation of glucose or starch by yeast?
Oxygen
Carbon dioxide
Hydrogen
Both A and C
Name one organism which can live without oxygen.
What is anaerobic respiration? What happens during anaerobic respiration in yeast?
- Hydra
- Sponges
- Humans
- Birds
State the three common features of all the respiratory organs like skin, gills and lungs.
Name two animals which breathe through gills.
What is the respiratory organ of fish?
The two organisms which breathe only through their moist skin are :
(a) fish and frog
(b) frog and earthworm
(c) leech and earthworm
(d) fish and earthworm
Why do fishes die when taken out of water ?
Which of the following is most likely to have a much higher breathing rate?
(a) man
(b) fish
(c) dog
(d) sparrow
why is diffusion in suficient to meet the oxygen requirements of multicellular organisms like humans?
Which amongst these is one of the end product of anaerobic respiration?
Pyruvate
Ethanol
Glucose
ATP
Name an animal which depends on simple diffusion of gases for breathing.
What is one example of diffusion in the human body?
During fermentation, pyruvate is converted into carbon dioxide and G. In our muscle cells during vigorous exercise pyruvate is converted into H. In mitochondria, it is converted into carbon-dioxide and I. The fermentation process in yeast is also called J while that in mitochondria is referred to as K.
Identify G, H, I, J and K.
lactic acid, water, ethanol, fermentation, break-down of glucose
water, ethanol, lactic acid, aerobic respiration, anaerobic respiration
- water, lactic acid, glucose, aerobic respiration, anaerobic respiration
ethanol, lactic acid, water, anaerobic respiration, aerobic respiration
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 ?
Why simple diffussion will not meet the requirements of all the cells of multi-cellular organisms?
One of the following animals does not use tracheae as the respiratory organs. This animal is :
(a) grasshopper
(b) prawn
(c) mosquito
(d) cockroach
write differences between aerobic and anaerobic respiration.
Which of the following are the products of fermentation of glucose or starch by yeast?
Oxygen
Carbon dioxide
Hydrogen
Both A and C
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 ?
Which of the following statements are correct ?
(i) pyruvate can be converted into ethanol and carbon dioxide by yeast
(ii) fermentation takes place in the case of aerobic bacteria
(iii) fermentation takes place in mitochondria
(iv) fermentation is a form of anaerobic respiration
(a) (i) and (iii)
(b) (ii) and (iv)
(c) (i) and (iv)
(d) (ii) and (iii)
Name an animal which absorbs oxygen through its moist skin.
From where do the following take in oxygen ? (i) prawn (ii) rat.
Explain- photosynthesis is considered a process supporting all life on earth.
An organism X having breathing organs A lives on land. When organism X goes under water, 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 to breathe 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 the organism Y be? Name the breathing organs B.
(c) What could the 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?
One of the following organism does not depend on simple diffusion of gases for breathing and respiration. This organism is :
(a) Amoeba
(b) Prawn
(c) Planaria
(d) Bryophyllum
Which of the plant takes in for photosynthesis from the surrounding water
Mustard
Paddy
Hydrilla
All of these plants