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4

A chitinous lining in earthworm is found in

A. pharynx

B. stomach

C. typholsole

D. gizzard

Correct Answer :

B. stomach


Related Questions

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Metamerism is present in

A. House fly

B. Frog

C. Nereis

D. All of these

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Chloragogen cells of Pheretima play a role very much like that of

A. Liver of vertebrates

B. Choanocytes of sponges

C. Malpighian tubules of vertebrates

D. None of these

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Blood glands in Earthworm are associated with

A. excretion

B. digestion

C. secretion

D. none of these

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Locomotion in Earthworm is directly facilitated by

A. mucus secreted by epidermis

B. segmentation of the body

C. rhythmic contraction of segments

D. setae and contraction of segments

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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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In earthworm fertilisation occurs in

A. oviduct

B. water

C. cocoon

D. ootheca

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Chetae are totally absent in

A. Nereis

B. Hirudinaria

C. Heteroneresis

D. Pheretima

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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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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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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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Earthworms do not have any respiratory organs because

A. they do not need them

B. they are burrowing in habit

C. there is no sufficient space for such organs

D. the surface acts as an absorptive area which is larger than the volume

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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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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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4

In earthworm, the nephridia without neprostomes are

A. pharyngeal

B. integumentary

C. both (a) and (b)

D. none of these

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4

A chitinous lining in earthworm is found in

A. pharynx

B. stomach

C. typholsole

D. gizzard

What is the correct answer?

4

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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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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Anticoagulant secreted by leech is

A. Hirudin

B. Heparin

C. Haematin

D. Haemozoin

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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 female genital aperture in earthworm is present ventrally on segment

A. 10th

B. 12th

C. 14th

D. 18th

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Nereis is commonly called

A. earthworm

B. ringworm

C. roundworm

D. clemworm

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The gizzard of earthworm is an organ of

A. secretion of slime

B. excretion

C. absorption of digested food

D. crushing the food

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The fertilization in earthworms occurs in

A. oviduct

B. spermatheca

C. cocoon

D. clitellum

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In the blood vascular system of earthworm there are four pairs of hearts present in the first 13 segments. These are situated in the segments

A. 7th, 8 th, 9th and 10th

B. 8th, 10th, 12th and 15th

C. 8th, 9th, 12th and 13th

D. 7th, 9th, 12th and 13th

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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

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The number of segments in leech is

A. 26

B. 33

C. 44

D. 120

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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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The terminal nephridial ducts of the septal nephridia of Pheretima open into

A. each intersegmental septum

B. septal excretory canal

C. lumen of the intestine

D. supra-intestinal excretory ducts

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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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The direction of blood flow in the dorsal vessel of earthworm is

A. from the posterior to the anterior end

B. from the anterior end to the posterior end

C. from dorsal vessel to ventral vessel

D. alternately in both directions (a) and (b)