AIIMS Medical Entrance Biology Questions and Answers

11.   Velamen present in orchids help in (AIIMS, 2007)
a) respiration
b) absorbing water from support
c) absorption of moisture from air
d) synthesising food
12. Hydroponics is (AIIMS, 2007)
view of hydroponics
a) water less culture
b) soilless culture
c) nutrient less culture
d) none of these
13. Which statement is true? (AIIMS, 2007)
a) adenine has 4 nitrogen atoms
b) cytosine has 3 nitrogen atoms
c) guanosine has 3 nitrogen atoms
d) uracil has 5 nitrogen atoms
14.  How many sperms are formed from a secondary spermatocyte? (AIIMS, 2008)
a) 1
b) 2
c) 8
d) 4
15. Grey crescent is the area (AIIMS, 2008)
a) at the point of entry of sperm into ovum
b) just opposite to the site of entry of sperm into ovum
c) at the vaginal pole
d)at the animal pole
16. Injury to vagus nerve in humans is not likely to affect (AIIMS, 2008)
a) tongue movements
b) pancreatic secretion
c) cardiac movement
d) gastrointestinal movements
17. Homo erectus evolved during (AIIMS, 2009)
a) pleistocene
b) pliocene
c) miocene
d) holocene
18. Intermediate host  is absent in the infection of (AIIMS, 2009)
a) Plasmodium
b) Entamoeba
c) Trypaosoma
d) Filarial worm
19. Which one features is common to leech, cockroach and scorpion?(AIIMS, 2009)
a) nephridia
b) antennae
c) cephalization
d) ventral nerve cord
20. Microvilli of intestinal epithelium are similar in function with  (AIIMS, 2010)
a) typhlosole in earthworm
b) hepatic caecae in cockroach
c) intestinal caecum in earthworm
d) Malpighian tubules in cockroach
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Answers
11. c) absorption of moisture from air
12. b) soilless culture
13. a) adenine has 4 nitrogen atoms
14. b) 2
15. b) just opposite to the site of entry of sperm into ovum
16. a) tongue movements
17. a) pleistocene
18. b) Entamoeba
19. d) ventral nerve cord
20. a) typhlosole in earthworm
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