Respiration in Lower Animals

Q.

Respiratory structures in the insects are

1. Gills

2. Skin

3. Lungs

4. Trachea

Q.

Amoeba does not require any respiratory pigment to transport oxygen. The possible reason could be ___

1. They do not need oxygen for respiration

2. They are too primitive to respire

3. Exchange of gases occurs by diffusion

4. They trap oxygen along with food

Q.

In Amoeba, respiration takes place through its __________.

Q.

Which of the following statements is incorrect?

1. The principle of countercurrent flow facilitates efficient respiration in gills of fishes.

2. Whales and dolphins do not have lungs.

3. Amoeba gets oxygen through simple diffusion across their cell membrane from the surrounding water.

4. The residual air in lungs slightly decreases the efficiency of respiration in mammals.

Q.

How does Amoeba breathe?

Q.

Which one is the odd one out

1. Frogs

2. Fish

3. Earthworm

4. Bacteria

Q.

Why do fishes die when taken out of water?

Q.

Fishes respire with the lungs.

1. True

2. False

Q.

Frog breaths through

1. Skin

2. Gills

3. Mouth

4. Feet

Q.

Name the respiratory organs of the following organisms. [3 marks]

a) Fishes

b) Mosquitoes

c) Earthworms

Q.

What could be the possible explanation for the evolution of four-chambered heart in mammals as opposed to two-chambered heart in fishes?

1. Fishes do not require energy to maintain body’s temperature.

2. Fishes have efficient gills.

3. Fishes do not have complex body structure like mammals.

4. Fishes can store more energy than mammals.

Q. Match the following.

1. Lungs
2. Gills
3. Moist skin
4. Tracheae

Q. Which of the following is/are the characteristic(s) of a living being?

1. Reproduction
2. Respiration
3. Excretion
4. Growth

Q.

Respiratory structures in the insects are

1. Gills

2. Skin

3. Lungs

4. Trachea

Q.

Why is diffusion insufficient to meet the oxygen requirements of multicellular organisms like humans?

Q. A rat, mosquito, earthworm and frog were kept in airtight boxes separately, in such a manner that only their head was outside, but they were fed with the food, according to their food habit. After sometime, it was found that one of them died. WHICH animal died and WHY?

Q. Give reasons for:
(i) People climbing to high altitudes may suffer from dizziness and unsteady vision.
(ii) Use of lime water in most experiments on respiration.
(iii) Respiration rate is higher in animals than in plants.

Q. The throat is moved up and down about 80-120 times per minute in a frog, such movements are called as

1. Oscillatory
2. Respiratory
3. None of the above
4. Springing

Q. Which of the following is/are the characteristic(s) of a living being?

1. Respiration
2. Excretion
3. Reproduction
4. Growth

Q.

What makes the concept map of fermentation in yeast complete?

1. 1 – Glucose, 2- CO_2, 3- Butanol

2. 1 – Starch, 2- H_2, 3- Lactic acid

3. 1 – Starch, 2- H_2, 3- Ethanol

4. 1 – Glucose, 2- O_2, 3- Ethyl alcohol

Q.

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

1. Presence of oxygen

2. Presence of more wheat flour

3. Excess supply of oxygen

4. Absence of oxygen

Q. The rate of breathing in aquatic organisms is much greater than that in terrestrial ones. Why?

1. Aquatic organisms have a greater surface area than terrestrial ones

2. None of the above

3. Amount of dissolved oxygen in water is fairly low compared to that in air

4. Aquatic organisms have a greater oxygen intake requirement than terrestrial ones

Q.

In anaerobic respiration

1. CO₂ is given out.

2. O₂ is taken in.

3. CO₂ is taken in.

4. O₂ is given out.