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Which of the following develops from ectoderm ?

A. Spinal cord and brain

B. Liver and heart

C. Eye and skin

D. Notochord and vertebral colum.

Correct Answer :

A. Spinal cord and brain


Related Questions

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Meroblastic cleavage is found in

A. man

B. hen's egg

C. frog

D. rabbit

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The substance fertilizin is secreted by

A. ova

B. sperm

C. both and

D. primary spermatogonia

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The process of synthesis of yolk by the oocyte is termed

A. folliculogenesis

B. oogenesis

C. vitellogenesis

D. spermiogenesis

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A true coelom is covered by

A. ectoderm

B. endoderm

C. mesoderm

D. ecto and mesoderm

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Which of the following do not show parental care over their young ones ?

A. mammals

B. lizards

C. fowls

D. earwigs

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Grey cresent is present in

A. zygote of frog

B. brain of rabbit

C. eye of frog

D. retina of cockroach

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Human beings are

A. monoecious

B. dioecius

C. intersexual

D. hermaphrodites

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In frog's egg the divisoin is

A. holoblastic

B. meroblastic

C. diploblastic

D. triploblastic

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In the human female, the primary oocytes remain small without any growth for

A. 4-5 years

B. 6-8 years

C. 8 - 10 years

D. 12 -14 years

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In forg, the sperms released from the testis take the following route to reach the ureter:

A. Vasa efferentia, Bidder's canal, uriniferous tubule and nephrotome

B. Vasa efferentia, Bidder's canal, and uriniferous tubule

C. Vasa efferentia, uriniferous tubule nd Bidder's canal.

D. Vasa deferentia, uriniferous tubule and Bidder's canal

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In frog, gastrulation is completed by

A. epiboly

B. emboly

C. both and

D. delamination

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The formation of the neural tube is known as

A. neurulation

B. tubulation

C. crania tion

D. none of these

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Antifertilizin is secreted by

A. fertilized egg

B. spermatozoa

C. unfertilized egg

D. egg membranes

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The intestine of tadpole is

A. straight

B. curved

C. coiled

D. zig-zag

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Metamorphosis is a characteristic feature of

A. direct ontogenic development

B. indirect ontogenic development

C. chordates

D. embryogenesis in mammals

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During cleavage, the embryo

A. enlarges in size

B. decreases in size

C. retains the same size at the beginning

D. gradually enlarges in size

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The expulsion of completely developed foetus from the uterus is known as

A. ovuation

B. placentation

C. gestation

D. parturition

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Oogonia entering the growth phase of oogenesis is called

A. primary oocyte

B. secodnary oocyte

C. ootid

D. gonocyte

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For fertilization of the frog's egg

A. sperms of same species are essential

B. sperms do not need penetration

C. sperms of any animal can fertilize

D. only presence of male is sufficient

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Sexual reproduction in larval condition is known as

A. paedogamy

B. autogamy

C. isogamy

D. anisogamy

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If an unfertilized frog's egg is pricked with a micro-needle, it will

A. die immediately

B. start dividing

C. will remain undivided

D. transform into a tadpole at a faster rate

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The cellular movements during gastrula-tion are called

A. epiboly

B. emboly

C. morphogenetic movements

D. involution

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The nervous system, epidermis and hairs and nails are derivatives of

A. endoderm

B. mesoderm

C. ectoderm

D. chordomesoderm

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The first phase in the sexual reproduction of organisms is

A. spermatogenesis

B. oogenesis

C. spermiogenesis

D. gametogenesis

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Development of egg without fertilization is termed as

A. parthenogenesis

B. parthenocarpy

C. polyembryony

D. paedogenesis

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The allantoic vesicle arises from

A. foregut

B. midgut

C. hindgut

D. somatopleure

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Human egg is

A. centrolecithal

B. microlecithal

C. mesolecithal

D. telolecithal

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Cleidoic eggs are found in

A. birds

B. mammals

C. insects

D. molluscs

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During normal development the activation of the egg is achieved by

A. vitellogenesis

B. oogenesis

C. spermatogenesis

D. fertilization

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A freshly unfertilised egg of hen contains

A. one cell

B. 100 cells

C. 1000 cells

D. 10000 cells