Question

I. Fill in the blanks:
1. When food is broken down, the reaction produces......(water / dirt) and..... (Carbon dioxide
loxygen).
2............(Breathing/ Respiration) is the process of intake of air rich in oxygen.
3. Enzymes and other catalysts are involved in the process of....... (Breathing / Respiration).
4. In animals such as insects, there are several holes called.......(spiracles/stomata).
5. Most aquatic animals such as fish use special organs called .... (Gills/trachea) for respiration.
II. Choose the correct option.
1. Which of these allows exchange of gases?
a. Respiration b. Digestion
c. Excretion
d. None of these
2. The intake of air rich in oxygen takes place during
a. Exhalation b. Inhalation
c. Both a and b d. None of these
3. Which of these is a respiratory organ of insects?
a. Nose b. Spiracles
c. Gills
d. Lungs
4. Which of these can be absorb air dissolved in water?
a. Gills
b. Spiracles c. Lungs
d. All of these
5.Air is exchange in which part of the human respiratory system?
a. Trachea b. bronchi c.alveoli d.larynx​

Answer 1

Answer:

1- water and oxygen

2- breathing

3- respiration

4- spiracles

5-gills

question II

1- option a

2- option b

3- option b

4- option a

5- option trachea

Answer 2

Answer:

1. Water and Oxygen

2. Breathing

3. Respiration

4. Spiracles

5. Gills

1. None of these

2. Inhalation

3. Spiracles

4. Gills

5. Lungs