121.
Grey crescent is the area
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 animal pole
D
at the vegetal pole
Answer :
just opposite to the site of entry of sperm into ovum
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122.
What is true about cleavage in fertilized egg of humans?
A
Meroblastic
B
Starts when egg reaches uterus
C
Starts in fallopian tube
D
It is identical to normal mitosis
Answer :
Starts in fallopian tube
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123.
Accessory sexual character in female is promoted by
A
Androgen
B
Progesterone
C
Estrogen
D
Testosterone
Answer :
Estrogen
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124.
The eggs of birds is called
A
Polylecithal
B
Megalecithal
C
Macrolecithal
D
All of the above
Answer :
All of the above
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125.
In human females, meiosis-II is not complete until?
A
fertilization
B
uterine implantation
C
birth
D
puberty
Answer :
fertilization
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126.
During the course of development cells in various regions of an embryo become different in appernace and perform diverse function this is
A
Gastrulation
B
Differentiation
C
Meta morphosis
D
Organisation
Answer :
Differentiation
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127.
Which of the following is haploid
A
Primary spermatocytes & primary Oocytes
B
Secondary spermatocytes & sec Oocytes
C
Spermatogonia and Oogonia
D
Germinal cells
Answer :
Secondary spermatocytes & sec Oocytes
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128.
The foetal ejection reflex in humans triggers release of
A
Oxytocin from maternal pituitary
B
Oxytocin from foetal pituitary
C
Human Chorionic Gonadotropin (hCG) from placenta
D
Human Placental Lactogen (hPL) from placenta
Answer :
Oxytocin from maternal pituitary
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129.
Which have macrolecithal eggs
A
Aves, Reptilia
B
Aves, Reptilia, Amphibia
C
Aves, Reptilia, Chiroptera
D
Aves, Eutheria
Answer :
Aves, Reptilia
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130.
Based on distribution of yolk, the egg of frog is
A
Telolecithal
B
Centrolecithal
C
Microlecithal
D
Alecithal
Answer :
Telolecithal
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