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4

The female genital aperture in earthworm is present ventrally on segment

A. 10th

B. 12th

C. 14th

D. 18th

Correct Answer :

C. 14th


Related Questions

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4

The enteronephric nephridia in earthworm are

A. integumentary

B. pharyngeal only

C. septal only

D. both (b) and (c)

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4

A chitinous lining in earthworm is found in

A. pharynx

B. stomach

C. typholsole

D. gizzard

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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

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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4

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

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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4

Spermathecae in earthworm represent

A. coating of sperms

B. structure for storing sperms

C. male copula to ry organs

D. female copulatory organs

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4

The female genital aperture in earthworm is present ventrally on segment

A. 10th

B. 12th

C. 14th

D. 18th

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4

Nephrostomes are found in

A. integumentary nephridia

B. septal nephridia

C. pharyngeal nephridia

D. none of these

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4

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

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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4

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)

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4

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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4

The excretory organs of earthworm are

A. kidneys

B. solenocytes

C. nephridia

D. green glands

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4

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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4

In Pheretima, the blood glands are located

A. close to lateral hearts in segments 12 and 13

B. along the latero-oesophageal hearts in segments 12 and 13

C. both (a) and (b)

D. behind the pharyngeal mass in segments 4, 5 and 6

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4

Blood glands in Earthworm are associated with

A. excretion

B. digestion

C. secretion

D. none of these

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4

Structure typically represented in every segment of earthworm is

A. ovary

B. chloragogen cell

C. testes

D. ganglia

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4

In earthworm, the septal nephridia put their excretory discharge into

A. intestine

B. blood

C. coelom

D. gizzard

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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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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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4

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

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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4

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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4

Chetae are totally absent in

A. Nereis

B. Hirudinaria

C. Heteroneresis

D. Pheretima

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4

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

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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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

The fertilization in earthworms occurs in

A. oviduct

B. spermatheca

C. cocoon

D. clitellum

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4

The number of segments in leech is

A. 26

B. 33

C. 44

D. 120