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4

Constructive change in the development of frog from tadpole is

A. disappearance of tail

B. food habit becoming carnivore

C. land habit

D. excretion beocmes mesonephric

Correct Answer :

A. disappearance of tail


Related Questions

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Development of egg without fertilization is termed as

A. parthenogenesis

B. parthenocarpy

C. polyembryony

D. paedogenesis

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Cleidoic eggs are found in

A. birds

B. mammals

C. insects

D. molluscs

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In the growing oocyte, the nucleus enlarges in size due to an increase in

A. Proteins

B. Nucleoplasm

C. DNA

D. RNA

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Oral contraceptives check

A. ovulation

B. fertilization

C. implantation

D. entry of sperms into vagina

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Sexual reproduction in larval condition is known as

A. paedogamy

B. autogamy

C. isogamy

D. anisogamy

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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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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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The allantoic vesicle arises from

A. foregut

B. midgut

C. hindgut

D. somatopleure

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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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A freshly unfertilised egg of hen contains

A. one cell

B. 100 cells

C. 1000 cells

D. 10000 cells

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In order to become structurally and functionally a spermatozoan, each spermatid has to undergo a process of differentiation called

A. spermiation

B. spermiogenesis

C. spermatogenesis

D. androgenesis

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The sexual embrage of the male and female frogs is called

A. copulation

B. amphimixis

C. syngamy

D. amplexus

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Which one has the capacity to reproduce without fertilization of eggs ?

A. Spider

B. Crow

C. Honeybee

D. Earthworm

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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.

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When the eggs are released from the ovary of frogs they are at the

A. primary oocyte stage

B. secondary oocyte stage

C. ootid stage

D. matured ova stage

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In frog's egg the divisoin is

A. holoblastic

B. meroblastic

C. diploblastic

D. triploblastic

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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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Oogonia entering the growth phase of oogenesis is called

A. primary oocyte

B. secodnary oocyte

C. ootid

D. gonocyte

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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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Embryo sac in a hen's egg is formed by

A. ectoderm

B. meso derm

C. somatic mesoderm and endoderm

D. splanchnic mesoderm and ectoderm

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How many cleavages are completed in 16 cell stages of frog's egg ?

A. 3

B. 8

C. 4

D. 12

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The formation, development and matura- j tion of the female gamete is called

A. ovulation

B. oogenesis

C. vitellogenesis

D. folliculogenesis

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The substance fertilizin is secreted by

A. ova

B. sperm

C. both and

D. primary spermatogonia

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Spermatoliosis is a process by which

A. the spermatids differentiate into spermatozoa

B. primary spermatcyte is tarnsformed into a secondary spermatocyte

C. spermatogonea complete multiplication phase

D. secondary spermatocyte extrudes polar bodies

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During metamorphosis, the disappearance of larval organs is called

A. histogenesis

B. paedogenesis

C. histolysis

D. paedomorphosis

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Which of the following does not show metamorphosis ?

A. Frog

B. Housefly

C. Hydra

D. Mosquito

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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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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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The intestine of tadpole is

A. straight

B. curved

C. coiled

D. zig-zag

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During the development of frog, the ar-chenteron is formed in

A. early blastula

B. late blastula

C. early gastrula

D. lategastrula