Home
Current Affairs January 2024

What is the correct answer?

4

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

Correct Answer :

B. septal excretory canal


Related Questions

What is the correct answer?

4

Anticoagulant secreted by leech is

A. Hirudin

B. Heparin

C. Haematin

D. Haemozoin

What is the correct answer?

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

What is the correct answer?

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

What is the correct answer?

4

Nereis is commonly called

A. earthworm

B. ringworm

C. roundworm

D. clemworm

What is the correct answer?

4

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

A. prostomium

B. peristomium

C. stomium

D. protostomium

What is the correct answer?

4

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

What is the correct answer?

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

What is the correct answer?

4

Annelids show advancement over the nematoda in having

A. metameric segmentation

B. true coelom

C. closed circulatory system

D. all of these

What is the correct answer?

4

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

What is the correct answer?

4

The enteronephric nephridia in earthworm are

A. integumentary

B. pharyngeal only

C. septal only

D. both (b) and (c)

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

What is the correct answer?

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

What is the correct answer?

4

Chromophil cells in earthworm are concerned with the secretion of

A. amylase

B. proteases

C. lipases

D. cocoon

What is the correct answer?

4

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

What is the correct answer?

4

The excretory organs of earthworm are

A. kidneys

B. solenocytes

C. nephridia

D. green glands

What is the correct answer?

4

The fertilization in earthworms occurs in

A. oviduct

B. spermatheca

C. cocoon

D. clitellum

What is the correct answer?

4

The gizzard of earthworm is an organ of

A. secretion of slime

B. excretion

C. absorption of digested food

D. crushing the food

What is the correct answer?

4

The coelomic fluid in earthworm escapes through

A. dorsal pores

B. coelomic pores

C. nephridial pores

D. anus

What is the correct answer?

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

What is the correct answer?

4

The female genital aperture in earthworm is present ventrally on segment

A. 10th

B. 12th

C. 14th

D. 18th

What is the correct answer?

4

In earthworm, the nephridia without neprostomes are

A. pharyngeal

B. integumentary

C. both (a) and (b)

D. none of these

What is the correct answer?

4

A chitinous lining in earthworm is found in

A. pharynx

B. stomach

C. typholsole

D. gizzard

What is the correct answer?

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)

What is the correct answer?

4

Spermathecae in earthworm represent

A. coating of sperms

B. structure for storing sperms

C. male copula to ry organs

D. female copulatory organs

What is the correct answer?

4

Pheretima is

A. sterile

B. unisexual

C. hermaphrodite

D. radial symmetrical

What is the correct answer?

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

What is the correct answer?

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

What is the correct answer?

4

In earthworm, the circular muscles are highly developed in

A. body wall

B. gizzard

C. typholsole

D. pharynx

What is the correct answer?

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

What is the correct answer?

4

Chetae are totally absent in

A. Nereis

B. Hirudinaria

C. Heteroneresis

D. Pheretima