Respiration in Lower Animals

Q. What is the breathing organ in insects? What are spiracles? [2 marks]

Q.

What could be the possible explanation for 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. What is tracheae?

Q. Insects have spiracles on the lower surface of the body.

1. True
2. False

Q. Draw neat and well-labelled diagrams of the following :
1. Transport system in plants.
2. feeding in Amoeba.

Q. Which of the following is the respiratory organ present in fishes?

1. Trachea
2. Heart
3. Gills
4. Lungs

Q. What is tracheae?

Q. In which of the following animals does respiration occur without any respiratory organ?

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

Q.

What makes the concept map of fermentation in yeast complete?

1. 1 – Starch, 2- H_2, 3- Ethanol

2. 1 – Glucose, 2- CO_2, 3- Butanol

3. 1 – Starch, 2- H_2, 3- Lactic acid

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

Q. Frogs have a pair of lungs like human beings for respiration.

1. True
2. False

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. Why do fishes die when taken out of water?

Q. Correct the following statement.
Statement : Unicellular organisms do not respire, only multicellular organisms respire.

1. Both unicellular and multicellular organisms respire.
2. None of the organisms respire.
3. None of the above.
4. Multicellular organisms do not respire, only unicellular organisms respire.

Q. Insects have spiracles on the lower surface of the body.

1. False
2. True

Q. In a cockroach, the air enters the body through ________.

1. Lungs
2. Gills
3. Skin
4. Spiracles

Q. Fill in the blank with a suitable word.

Q. How does exchange of gases for respiration occur in insects?

Q. Frogs have a pair of lungs like human beings for respiration.

1. False
2. True

Q. Respiratory organ present in spider is

1. Lungs
2. Skin
3. Gills
4. Book lungs

Q. Which among the following is responsible for breathing in fishes?

1. Trachea
2. Gills
3. Skin
4. Lungs

Q.

Respiratory structures in the insects are:

1. Gills
2. Tracheae
3. Lungs
4. Skin

Q. Which of these is a respiratory organ of insects?

(a) Nose
(b) Spiracles
(c) Gills
(d) Lungs

Q. Amphibians like frogs can breathe through on land and in water.

1. trachea
2. lungs
3. moist skin
4. spiracles