Options:
- A. Hydrophilic
- B. Hydrophobic
- C. Both of these
- D. None of these
View Answer
B. Hydrophobic
Biology
The maximum amount of oxygen which normal human blood absorbs and carries at sea level is ________ per 100 ml of blood.
Options:
- A. 10 ml
- B. 20 ml
- C. 30 ml
- D. 40 ml
View Answer
B. 20 ml
Number of spiracles present in the thorax of cockroach is___________?
Options:
- A. 2
- B. 3
- C. 5
- D. 4
View Answer
D. 4
Higher turgor pressure in a plant cell is maintained by________________?
Options:
- A. Large number of vacoules in a plant cell.
- B. Higher ionic concentration inside vacuoles resulting from active pumping of ions at their tonoplastic membrane
- C. Higher osmotic pressure of the cell vacuole
- D. both b and c
View Answer
D. both b and c
Which of the following is a uni-nucleated cell?
Options:
- A. A smooth muscle cell.
- B. A cardiac muscle cell.
- C. A skeletal muscle cell.
- D. All of these
View Answer
A. A smooth muscle cell.
What happens during muscle contraction to the length of each myosin and action filament?
Options:
- A. Z- lines get closer
- B. A band becomes short
- C. 1 band elongates
- D. There is no change in sarcomere
View Answer
A. Z- lines get closer
Which of the following statement is incorrect regarding the locomotion in Euglena?
Options:
- A. Move with the help of flagellum, attached to the anterior pole of the body.
- B. Flagellum whipping backwards moving the organism forward, and when moves forward the organism moves backward.
- C. Myonemes can change the direction of the body by making it to shorten from anterior to the posterior pole.
- D. None of these
View Answer
B. Flagellum whipping backwards moving the organism forward, and when moves forward the organism moves backward.
The uptake of water in plants involves__________?
Options:
- A. Active transport
- B. Passive transport
- C. Both of these
- D. None of these
View Answer
B. Passive transport
Lenticular transpiration is ___________ of total transpiration?
Options:
- A. 2-3%
- B. 1-3%
- C. 1-4%
- D. 1-2%
View Answer
D. 1-2%
Stomatal transpiration is __________ of total transpiration
Options:
- A. 90%
- B. 91%
- C. 93%
- D. 95%
View Answer
A. 90%