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4

The nitrogenous waste in earthworm consist of about

A. 40% urea and 40% uric acid

B. 50% urea and 40% ammonia

C. 40% ammonia and 20% amino acids

D. 60% ammonia and 20% amino acids

Correct Answer :

B. 50% urea and 40% ammonia


Related Questions

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A skeleton like function during locomotion of Pheretima is performed by

A. alimentary canal laiden with mud

B. blood

C. coelmic fluid

D. ventral nerve cord

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Earthworm is useful because it

A. helps in fixing atmospheric nitrogen

B. helps in making the land porous

C. kills harmful bacteria of the soil

D. helps in making the land fertile by turning it upside down

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In earthworm, the nephridia without neprostomes are

A. pharyngeal

B. integumentary

C. both (a) and (b)

D. none of these

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Structure typically represented in every segment of earthworm is

A. ovary

B. chloragogen cell

C. testes

D. ganglia

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The dorsal blood vessel in earthworm is

A. distributive in 1-13 segments

B. collective in 1-13

C. completely distributive

D. completely collective

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The coelom in Pherethna is

A. continuous throughout

B. continuous throughout except in first 26 segments

C. continuous only in first four segments

D. divided into a number of compartments throughout

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A chitinous lining in earthworm is found in

A. pharynx

B. stomach

C. typholsole

D. gizzard

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Chetae are totally absent in

A. Nereis

B. Hirudinaria

C. Heteroneresis

D. Pheretima

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The nitrogenous waste in earthworm consist of about

A. 40% urea and 40% uric acid

B. 50% urea and 40% ammonia

C. 40% ammonia and 20% amino acids

D. 60% ammonia and 20% amino acids

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4

In earthworm fertilisation occurs in

A. oviduct

B. water

C. cocoon

D. ootheca

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Pheretima is

A. sterile

B. unisexual

C. hermaphrodite

D. radial symmetrical

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The female genital aperture in earthworm is present ventrally on segment

A. 10th

B. 12th

C. 14th

D. 18th

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The cliteilum singulum in earthworm is formed by

A. 12,13 and 14 segments

B. 13,14 and 15 segments

C. 14,15 and 16 segments

D. 16,17 and 1&segments

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Earthworm has no skeleton but during burrowing, the anterior end becomes turgid and acts as a hydraulic skeleton due to

A. setae

B. circular muscles

C. coelomic fluid

D. longitudinal muscles

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Which region in earthworm is the forest of nephridia ?

A. Pharyngeal region

B. Clitellar region

C. Intestinal region

D. Typhlosolar region

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In earthworm, the circular muscles are highly developed in

A. body wall

B. gizzard

C. typholsole

D. pharynx

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Sperma thecae in earthworm are meant few

A. producing sperms

B. storage of its own sperms

C. storage of sperms of another earthworm after copulation

D. all of these

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Chromophil cells in earthworm are concerned with the secretion of

A. amylase

B. proteases

C. lipases

D. cocoon

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The fertilization in earthworms occurs in

A. oviduct

B. spermatheca

C. cocoon

D. clitellum

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In earthworm, the genital papillae are situated ventrally on segments

A. 17

B. 18

C. 19 and 22

D. 17 and 19

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5. The pre-typhlosolar region in Pheretima extends from

A. fifth to twenty-sixth segment

B. first to twenty-sixth segment

C. fifteenth to twenty-sixth segment

D. immediately after clitellar region to twenty sixth segment

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The septal and pharyngeal nephridia open into the alimentary canal and are of enteronephric type. It is an adaptation for

A. conservation of water

B. conservation of heat

C. regulation of temperature

D. regulation of amino acids

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Nereis is commonly called

A. earthworm

B. ringworm

C. roundworm

D. clemworm

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The coelomic fluid in earthworm escapes through

A. dorsal pores

B. coelomic pores

C. nephridial pores

D. anus

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Nephrostomes are found in

A. integumentary nephridia

B. septal nephridia

C. pharyngeal nephridia

D. none of these

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In earthworm testes are situated in the

A. 10th and 11th segments

B. 11th and 12th segments

C. 14th and 15th segments

D. none of these

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The number of segments in leech is

A. 26

B. 33

C. 44

D. 120

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The chloragogen cells of earthworm are analogous to

A. liver of invertebrates

B. liver of vertebrates

C. kidney of vertebrates

D. uriniferous tubules of vertebrates

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In earthworm, the first segment in which mouth is situated is known as

A. prostomium

B. peristomium

C. stomium

D. protostomium

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In earthworm, the septal nephridia put their excretory discharge into

A. intestine

B. blood

C. coelom

D. gizzard