1
NEET 2016 Phase 1
MCQ (Single Correct Answer)
+4
-1
Which of the following statements is not correct?
A
Pollen germination and pollen tube growth are regulated by chemical componrnts of pollen interacting with those of the pistil.
B
Some reptiles have also been reported as pollinators in some plant species.
C
Pollen grains of many species can germinate on the stigma of a flower, but only one pollen tube of the same species grows into the style.
D
Insects that consume pollen or nectar without bringing about pollination are called pollen/ nectar robbers.
2
NEET 2016 Phase 1
MCQ (Single Correct Answer)
+4
-1
Fertilisation in humans is practically feasible only if
A
the ovum and sperms are transported simultaneously to ampullary-isthmic junction of the cervix
B
the sperms are transported into cervix within 48 hrs of release of ovum in uterus
C
the sperms are transported into vagina just after the release of ovum in Fallopian tube
D
the ovum and sperms are transported simultaneously to ampullary$$-$$isthmic junction of the Fallopian tube.
3
NEET 2016 Phase 1
MCQ (Single Correct Answer)
+4
-1
Changes in GnRH pulse frequency in females is controlled by circulating levels of
A
progesterone only
B
progesterone and inhibin
C
estrogen and progesterone
D
estrogen and inhibin.
4
NEET 2016 Phase 1
MCQ (Single Correct Answer)
+4
-1
Select the incorrect statement.
A
LH and FSH decreases gradually during the follicular phase.
B
LH triggers secretion of androgen from the Leydig cells.
C
FSH stimulates the sertolicells which help in spermiogenesis.
D
LH triggers ovulation in ovary.
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