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4

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

Correct Answer :

B. Choanocytes of sponges


Related Questions

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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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4

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 fertilization in earthworms occurs in

A. oviduct

B. spermatheca

C. cocoon

D. clitellum

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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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4

Anticoagulant secreted by leech is

A. Hirudin

B. Heparin

C. Haematin

D. Haemozoin

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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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4

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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4

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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4

In earthworm, the circular muscles are highly developed in

A. body wall

B. gizzard

C. typholsole

D. pharynx

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Role of typhlosole in the intestine of earthworm is

A. to kill bacteria

B. to increase absorptive surface

C. to produce digestive enzymes

D. to control blood flow

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4

Annelids show advancement over the nematoda in having

A. metameric segmentation

B. true coelom

C. closed circulatory system

D. all of these

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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 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

Copulation occurs between two earthworms

A. generally at night during rainy season

B. generally at day time during rainy season

C. at night during winter season

D. at night during summer season

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A chitinous lining in earthworm is found in

A. pharynx

B. stomach

C. typholsole

D. gizzard

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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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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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Pheretima is

A. sterile

B. unisexual

C. hermaphrodite

D. radial symmetrical

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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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4

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 septal nephridia put their excretory discharge into

A. intestine

B. blood

C. coelom

D. gizzard

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Which of the following statements is correct ?

A. Blood of earthworm is blue in colour

B. Blood pigment of earthworm is haemocyanin

C. Blood pigment of earthworm is red and haemoglobin is dissolved in plasma

D. Blood of earthworm is red and haemoglobin is dissolved in RBC

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4

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 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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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 first segment in which mouth is situated is known as

A. prostomium

B. peristomium

C. stomium

D. protostomium

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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