411.
The enzyme hyaluronidase helps in penetratio of sperm in to egg, it is
A
Present in sperm
B
Present in ovum
C
Present in sperm & ovum both
D
Derived from the external medium
Answer :
Present in sperm
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412.
If somatic chromosomes numbeer is 40. What shall be chromosomal number in the cell of seminiferous tubules
A
40
B
20
C
10
D
40 and 20
Answer :
40 and 20
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413.
Cleidoic eggs are characteristtic of
A
Mammls
B
Reptiles, Birds & Insects
C
Insects only
D
Fishes
Answer :
Reptiles, Birds & Insects
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414.
In a mammalian sperm, spirally arranged mitochondria around ans axial filament occurs in
A
Middle piece
B
Head
C
End peice of tail
D
Principal piece of tial
Answer :
Middle piece
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415.
Megaleciithal egg are found in
A
Reptiles, & birds
B
Tunicast, amphibia, monotrems
C
Annelida, echnoderm, coelentrta
D
Sponge, reptiles, monotrems
Answer :
Reptiles, & birds
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416.
10 oogonia yield 10 primary oocytes, then how many ova are produced on completion of oogenesis
A
5
B
10
C
20
D
40
Answer :
10
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417.
In the urinogenital organs of rabbit which one of following part is present in male but not in female
A
Urethra
B
Fallopian tube
C
Vagina
D
Vasa deferens
Answer :
Vasa deferens
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418.
Hormones secreted by the placenta to maintain pregnancy are
A
hCG, hPL, progestogens, prolactin
B
hCG, hPL, estrogens, relaxin, oxytocin
C
hCG, progestogens, estrogens, glucocorticoids
D
hCG, hPL, progestogens, estrogens
Answer :
hCG, hPL, progestogens, estrogens
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419.
Foetal sex is determined by examining cells from amniotic fluid looking for
A
Chiasmata
B
Autosomes
C
Sex-chromosomes
D
Nucleus
Answer :
Sex-chromosomes
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420.
Which of the following undergoes spermiogenesis
A
Spematids
B
Spermatogonia
C
Primary spermatocytes
D
Secondary spermatocytes
Answer :
Spematids
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