If a respiratory surface dries out, gas exchange will
1). Increase
2). Decrease
3). Stop
4). Not be affected
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2. Number of eyes in Leech is—
3. Which is the purest form of iron ?
4. Which mineral is the ore Of aluminium?
5. In a railway track two rails rejoined end to end with a gap in between them because
6. Anthrax is a serious disease of
7. Which of the following is not an isotope of hydrogen?
8. Which one of the following is used to restore the colour of old oil paintings?
9. Carbon monoxide has greater affinity for hemoglobin as compare to oxygen