501. Which set of structures is ectodermal in orgin

A Brain, liver, gills
B Spinal cord, heart, epidermis
C Epidermis, brain, retina
D Dermis, lung, nerves
Answer :   Epidermis, brain, retina
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502. Vaginal cavity of tunicalvaginalis is found in

A Ovariesof female
B Testis of male
C Vagina of female
D None of the above
Answer :   Testis of male
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503. Types of cleavage in centrolecithal eggs

A Spiral
B Superficial
C Discoidal
D Unequal holoblastic
Answer :   Superficial
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504. Which substance can be used as male contraceptive in future

A FSG
B LH
C Testosterone
D Progesterone
Answer :   Progesterone
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505. Scrotal sacs of man and rabbit are connected with the abdominal cavity by

A Inguinal canal
B Haversian canal
C Vagina cavity
D Spermatic canal
Answer :   Inguinal canal
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506. What is formed at the time of gastrulation

A Gills
B Heart
C Myotome
D Archenteron
Answer :   Archenteron
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507. In the absence of prignancy. Corpus luteum

A Becomes active, secretes FSH and LH
B Produces lot of oxytiocin and relaxin
C Degenerates after some time
D Is maintained by progesterone.
Answer :   Degenerates after some time
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508. The type of placenta fund in human beings is of types

A Diffuse
B Zonary
C Cotyledonary
D Discoidal
Answer :   Discoidal
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509. Egg with peripheral cytoplasm around the yolk is

A Isolecithal
B Microlecithal
C Telolecithal
D Centrolecithal
Answer :   Centrolecithal
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510. The first indication of division of labour in the blastomeres appear at

A Murula stage
B Blastula stage
C Gastrula stage
D Neurul stage
Answer :   Gastrula stage
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