1
AIPMT 2002
MCQ (Single Correct Answer)
+4
-1
Adrenaline directly affects on
A
S.A. node
B
$$\beta $$-cells of Langerhans
C
dorsal root of spinal nerve
D
epithelial cells of stomach.
2
AIPMT 2002
MCQ (Single Correct Answer)
+4
-1
In angiosperms pollen tube liberate their male gametes into the
A
central cell
B
antipodal cells
C
egg cell
D
synergids.
3
AIPMT 2002
MCQ (Single Correct Answer)
+4
-1
In angiosperm all the four microspores of tetrad are covered by a layer which is formed by
A
pectocellulose
B
callose
C
cellulose
D
sporopollenin.
4
AIPMT 2002
MCQ (Single Correct Answer)
+4
-1
What is the direction of micropyle in anatropous ovule?
A
Upwards
B
Downward
C
Right
D
Left
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