Gaseous Exchange in Other Animals

Q.

What is the respiratory organ of a frog?

Q.

How do fish take in oxygen?

Q.

Explain how diffusion takes place in Amoeba.

Q.

Fermentation takes place in ________.

Q.

Respiration in Amoeba occurs through the diffusion of gases in its cell membrane.

1. True
2. False

Q.

Yeast and other anaerobic bacteria are used in producing additive of gasoline at large scale. Why?

1. Produce more ethanol

2. Yeast and anaerobic bacteria undergo fermentation

3. Multiplies at a faster rate

4. All the above

Q.

Fish absorb oxygen through

1. gills

2. lungs

3. tail

4. mouth

Q.

Which of the following does not respire through lungs?

1. Frog

2. Dog

3. Whale

4. Leech

Q. Which organism is used in wine and beer preparation and why?

Q.

Yeast is used as a raising agent in the preparation of bread. Which type of respiration happens in yeast?

1. carbon dioxide

2. water

3. oxygen

4. glucose

Q. 1) Sponges have internal surface area with lots of tiny holes to hold water.Our lungs are not very big, so how can they have large internal surface area?

2) Why do our lungs need to have a internal surface area?

Q. Which of the following about frogs is incorrect?

1. They have a three-chambered heart
2. They belong to class Amphibia
3. They lay eggs in water
4. They breathe through gills in water

Q. Question 18
A food stall owner was preparing dough for making bhaturas. He added a pinch of yeast and sugar to the dough and left it in a warm place. After few hours, the dough had risen. There was a sour smell too.
(a) Why did the dough rise?
(b) Why did the dough smell sour?
(c) Why was sugar added to the dough?
(d) What would have happened if the dough was kept in the refrigerator, soon after it was prepared?

Q.

Which one of the following condition helps in the puffing up of dough when mixed with yeast?

1. Excess supply of oxygen

2. Absence of oxygen

3. Presence of nitrogen

4. Presence of more wheat flour

Q. Identify the organism that can breathe through both skin and lungs.

1. Fish
2. Earthworm
3. Frog
4. Cockroach

Q. In tadpole stage, frogs breathe through their _____.

1. heart
2. lungs
3. skin
4. gills

Q. Which organism is used in wine and beer preparation and why?

Q. Yeast is used in wine and beer industries because it respires _____________.

1. aerobically producing oxygen
2. aerobically producing alcohol
3. anaerobically producing alcohol
4. anaerobically producing CO₂

Q. Which of the following is one of the end products of anaerobic respiration?

1. Pyruvate
2. Ethanol
3. Glucose
4. Water

Q.

In anaerobic respiration

1. O₂ is given out.

2. CO₂ is given out.

3. CO₂ is taken in.

4. O₂ is taken in.

Q. Which of the following organism does not respire through lungs?

1. Frog
2. Dog
3. Whale
4. Leech

Q.

Fishes respire with the lungs.

1. False

2. True

Q.

Observe the pictures below and predict the condition required for the dough to puff up when mixed with yeast granules.

1. Excess supply of oxygen

2. Absence of oxygen

3. Presence of oxygen

4. Presence of more wheat flour

Q. Why is idli/ dosa batter prepared and stored overnight?

Q.

Bread rises due to the anarobic respiration of yeast by carbon dioxide. Another by product is alcohol. Does that mean bread has alcohol in it?

Q. Unlike humans, dogs cannot perspire to get rid to excess metabolic heat. They lose metabolic heat by

1. Panting
2. Taking a bath
3. Running in windy conditions
4. Rolling in water bodies

Q.

The source of oxygen for aquatic animals is

1. soil

2. water

3. Atmosphere

4. None of the above

Q. Try to hold your breath as long as you can. You might have observed great discomfort in the body. This is due to increase in ${CO}_2$ levels in the lungs and the respiratory part of the brain forces you to breathe and sends painful contractions of the diaphragm and muscles in the ribs. Where does this ${CO}_2$ come from in the first place?

1. Burning of glucose in muscles
2. End product of cellular respiration
3. Burning of glucose when we work out
4. None of these

Q.

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.

1. lactic acid, water, ethanol, fermentation, break-down of glucose

2. ethanol, lactic acid, water, anaerobic respiration, aerobic respiration

3. water, ethanol, lactic acid, aerobic respiration, anaerobic respiration

4. None of the above