| 1 |
Air spaces between mesophyll cells of a leaf comprise ______ of the total volume |
- A. 20%
- B. 30%
- C. 40%
- D. 50%
|
| 2 |
Raspatory activity which occurs in plants during day time is called. |
- A. Respiration
- B. Transpiration
- C. Photorespiration
- D. Cutaneous respiration
|
| 3 |
The main tracheal trunk in cockroach communicates with exterior by |
- A. 100 pairs
- B. 10 pairs
- C. 8 pairs
- D. 4 pairs
|
| 4 |
Breakdown of Alveoli of lungs is called. |
- A. Asthma
- B. Lungs cancer
- C. Emphysema
- D. Tuberculosis
|
| 5 |
Blood is not involved in transport of gasses in. |
- A. Frog
- B. Man
- C. Earthworm
- D. Cockroach
|
| 6 |
Heart burn is a painful sensation in the |
- A. Stomach
- B. Small intestine
- C. Chest cavity
- D. Pharynx
|
| 7 |
Myoglobin occurs in |
- A. Red blood cells
- B. White blood cells
- C. Plasma
- D. Muscle fibres
|
| 8 |
100 ml of arterial blood of human being contains CO2 |
- A. 50 ml
- B. 54 ml
- C. 56 ml
- D. 58 ml
|
| 9 |
The irritant substances of smoke generally cause |
- A. Smoker's hiccough
- B. Smoker's sneeze
- C. Smoker's yawing
- D. Smoker's cough
|
| 10 |
How many molecule of oxygen can bind with a molecule of myoglobin. |
|