431.
The cavity, which formed during gastrulation is named
A
Blastocoels
B
Archenteron
C
Coelom
D
Pseudocoel
Answer :
Archenteron
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432.
Vascular tissue is derived from
A
Epithelium
B
Ectoderm
C
All germinal layers
D
Mesoderm
Answer :
Mesoderm
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433.
What part of the spermatid forms acrosome of sperm
A
Mitochondria
B
Golgibody
C
Nucleus
D
Lysosome
Answer :
Golgibody
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434.
"Oligo lecithal" egg are these which have
A
No yolk
B
Small yolk
C
More yolk
D
Moderate yolk
Answer :
Small yolk
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435.
Internal fertilization in animals in mainly concerned
A
With presenc of copulatory orgen
B
To ensure fertilization
C
With an adaption to the terrestrial life
D
With conservation of semen
Answer :
With an adaption to the terrestrial life
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436.
The signals for parturition originate from
A
placenta only
B
placenta as well as fully developed foetus
C
oxytocin released from maternal pituitary
D
fully developed foetus only
Answer :
placenta as well as fully developed foetus
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437.
In which stage rate of cell-division decrease
A
Morula
B
Gastrula
C
Blastula
D
Zygote
Answer :
Gastrula
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438.
Progesterone is
A
Carbohydrate
B
Steroid
C
Protein
D
Sterol
Answer :
Steroid
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439.
Central stroma of ovary is made up of
A
Fibrous conective tissue
B
Reticular tissue
C
Adipose connective tissue
D
None of the above
Answer :
Fibrous conective tissue
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440.
Then most important significance of fertilizin & antifertilizin reaction is to
A
Preserve the sperm
B
Ensure that t least few spermatozoa encounter the egg
C
Mutually attract the gametes of opposite sexes
D
Ensure fusion of gamete of same species
Answer :
Ensure fusion of gamete of same species
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