21.
Freshly released human egg has
A
one Y-chromosome
B
one X-chromosome
C
two X-chromosomes
D
one X-chromosome & one Y-chromosome
Answer :
one X-chromosome
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22.
Spiral & determinative cleavage is common amongst
A
Amphibia
B
Nematoda, annelida, mollusc
C
Amniotes
D
Molusca & amphibia
Answer :
Nematoda, annelida, mollusc
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23.
Cowper's glands are found in
A
Male mammals
B
Female birds
C
Male amphibians
D
Female amphibians
Answer :
Male mammals
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24.
Function of seminal fluid is
A
Sexual attraction
B
To provide stability to egg
C
To provide a medium for movenent of sperms
D
To provide acidic medium
Answer :
To provide a medium for movenent of sperms
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25.
Which extra-embryonic membrane in humans prevents desiccation of the embryo inside the uterus?
A
Chorion
B
Allantois
C
Yolk sac
D
Amnion
Answer :
Amnion
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26.
Yolk is composed of
A
Carbohydrate
B
Protein
C
Phospholipid
D
All of the above
Answer :
All of the above
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27.
The part of fallopian tube closest to the ovary is
A
isthmus
B
infundibulum
C
cervix
D
ampulla
Answer :
infundibulum
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28.
Acrosome reaction in sperm is triggered by
A
capacitation
B
release of lysin
C
influx of $$N{a^ + }$$
D
release of fertilizin
Answer :
release of fertilizin
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29.
Menstrual cycle is generally of
A
21 days
B
28 days
C
38 days
D
40 days
Answer :
28 days
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30.
Fixing up of the blastocyst in the wall of the uterus is known as
A
Fertilization
B
Implantation
C
Impreganation
D
Placentation
Answer :
Implantation
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