Biology
X-ray machine operator have to take special care to avoid exposure of X-rays.
Which of the following reasons support this statement?
P. X-ray damage the body cells.
Q. Too frequent exposure may cause genetic variations, bone cancer etc.
R. Too much X-rays exposure are not harmful.
- Only P
- Only Q
- Only P and Q
- Only Q and R
Related Questions
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- diapedesis
- haemopoiesis
- phagocytosis
- cyclosis
The rate of comparison of transpiration from both surfaces of a dorsiventral leaf is measured using
- Ganong's potometer
- Darwin's potometer
- Garreau's potometer
- Farmer's potometer
The average ratio of male to female individuals based on XX and XY type of sex-determination, in a human population is
- 3:1
- 1:3
- 1:4
- 1:1
Harish was crossing the road when he suddenly slipped on a banana peel and fell on the road. After some time the inflamed region developed redness, swelling, pain with increased local heat.
Which of the following is/are involved in the process mentioned above?
(a) Leucocytes
(b) Erythrocytes
(c) Plasma
(d) Lymph- Only a
- Only a and c
- Only a, c and d
- Only a, b and c