Kidney of vertebrates resembles with contractile vacuole of protozoan in
1). Expelling out glucose
2). Expelling out urea and uric acid
3). Expel1ing out excess of water
4). Expelling out salts
Which of the following set represents all vestigial structures in the human body?
1). Vermiform appendix, body hair and cochlea
2). Wisdom teeth, coccyx and patella
3). Coccyx, vermiform appendix and muscles of ear pinna
4). Body hair, muscles of ear pinna and atlas vertebra
The number of segments in leech is—
1). 26
2). 33
3). 36
4). 40
If a respiratory surface dries out, gas exchange will
1). Increase
2). Decrease
3). Stop
4). Not be affected
At high altitude, RBCs of human blood will
1). Increase in number
2). Decrease in number
3). Decrease in size
4). Increase in size