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Which of the following feature is not correct regarding the figure given below? 
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A. It is an aquatic form.

B. Circulatory system is of open type.

C. It possesses parapodia for swimming.

D. Neural system consists of paired ganglia connected by lateral nerves to a double ventral nerve cord.

Correct Answer :

B. Circulatory system is of open type.


The given figure (Nereis) is an example of annelida. Annelida is a group commonly referred to as segmented worms, and they are found worldwide from the deepest marine sediments to the soils. Circulatory system is of closed type.

Related Questions

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Refer the figures A, B, C and D given below. Which of the following options shows the correct name of the animals shown by the figures A, B, C and D ? 
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A. A – Locust, B – Scorpion, C – Prawn, D – Pila

B. A – Locust, B – Prawn, C – Scorpion, D – Pila

C. A – Locust, B – Scorpion, C – Prawn, D – Snail

D. A – Butterfly, B – Scorpion, C – Prawn, D – Pila

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Refer the types of cells present in some animals. Each cell is specialized to perform a single specific function except

A. Cnidocytes

B. Choanocytes

C. Interstitial cells

D. Gastrodermal cells

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Which of the following belong to phylum arthropoda?

A. Bombyx and Apis

B. Laccifer and Anopheles

C. Locusta and Limulus

D. All of the above

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In which of the phylum, excretory organ like proboscis gland is present?

A. Hemichordata

B. Chordata

C. Echinodermata

D. Annelida

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Which of the following sets of animals give birth to young ones?

A. Platypus, Penguin, Bat, Hippopotamus.

B. Shrew, Bat, Cat, Kiwi.

C. Kangaroo, Hedgehog, Dolphin, Loris.

D. Lion, Bat, Whale, Ostrich.

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Which of the following statement(s) is/are correct regarding phylum mollusca?

A. They are bilaterally symmetrical, triploblastic and coelomate animals.

B. Body is covered by a calcareous shell and is unsegmented with a distinct head, muscular foot and visceral hump.

C. The mouth contains a file-like rasping organ for feeding, called radula.

D. All of the above

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Which of the following is a poisonous snake?

A. Naja (Cobra)

B. Bangarus (Krait)

C. Viper (Viper)

D. All of these

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Which one of the following statement regarding coelom of given animals is correct?

A. Round worms (aschelminthes) are pseudocoelomates.

B. Molluscs are acoelomates.

C. Insects are pseudocoelomates.

D. Flatworms (platyhelminthes) are coelomates.

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Identify the figure with its correct name and phylum. 
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A. Sycon - Porifera

B. Aurelia - Coelenterata

C. Pleurobrachia - Ctenophora

D. Tapeworm - Platyhelminthes

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Which of the following features distinguish mammals from other vertebrates ?

A. Hairy skin and oviparity

B. Hairy skin and mammary glands

C. Mammary glands and teeth

D. Pinna and teeth

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A file like rasping organ for feeding, called radula, present in the phylum __________.

A. arthropoda

B. mollusca

C. echinodermata

D. chordata

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Which of the following is a fresh water sponge?

A. Sycon

B. Euspongia

C. Spongilla

D. Pleurobrachia

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Match the features given in column I with their examples given in column II and choose the correct match from the option given below.
Column-IColumn-II
(Features)(Examples)
A. Pseudocoelomatesa. Hydra, Adamsia
B. Diploblasticb. Ctenoplana, Aurelia
C. Cellular level ofc. Ascaris, Wuchereria organization
D. Radial symmetryd. Sycon, Spongilla
E. Metamerisme. Pheretima, Neries

A. A - e, B - b, C - d, D - c, E - a

B. A - c, B - a, C - d, D - b, E - e

C. A - b, B - a, C - c, D - e, E - d

D. A - c, B - b, C - d, D - a, E - e

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Which of the following animal contains respiratory organs like, gills, book gills, book lungs or tracheal system? 
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A. Click to check answer

B. Click to check answer

C. Click to check answer

D. Click to check answer

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The given figures of animals (A & B) are distinguished on the basis of symmetry. Select the correct option which shows the type of symmetry and its description against the animals.
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A. A : Biradial, organisms is divided into unequal halves by any plane through the central axis.

B. B: Bilateral, body is divided into equivalent right and left halves by only one plane.

C. A: Asymmetrical, organisms is not divided into equal halves by any plane through the central axis.

D. B: Radial, in which any plane passing through the central axis of the body divides the organism into two identical halves.

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Which of the following group of animals belongs to the same phylum?

A. Earthworm, pinworm, tapeworm

B. Prawn, scorpion, Locusta

C. Sponge, Sea anemone, starfish

D. Malarial parasite, Amoeba, mosquito

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Refer the given figures A, B, C and D and identify the option which shows their correct name. 
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A. A - Pleurobrachia, B - Cnidoblast, C - Aurelia, D - Adamsia

B. A - Aurelia, B - Adamsia, C - Cnidoblast, D - Pleurobrachia

C. A - Cnidoblast, B - Pleurobrachia, C - Adamsia, D - Aurelia

D. A - Adamsia, B - Aurelia, C - Pleurobrachia, D - Cnidoblast

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In amphibians, respiration occurs through

A. gills

B. lungs

C. skin

D. all of these

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Hemichordates have now been placed with the nonchordates, close to echinoderms, because true

A. notochord is absent.

B. pharyngeal gill-slits are lacking.

C. dorsal nerve cord is absent.

D. heart is lacking.

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Refer the following statement and answer the question. 'Name of X is derived from stinging capsules. It exhibits metagenesis containing two body forms in which sessile and cylindrical form is called Y and umbrella shaped and free swimming is called Z. Identify X, Y, and Z.

A. X - Coelenterate, Y - Polyp, Z - Medusa

B. X - Cnidarian, Y - Medusa, Z - Polyp

C. X - Ctenophora, Y - Radula, Z - Hypostome

D. X - Porifera, Y - Osculum, Z - Radula

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A student brought home a strange animal which he found outside under a rock. It had moist skin, a complete digestive tract, a ventral nerve cord, and had gone through torsion. Identify the phylum of the animal.

A. Porifera

B. Annelida

C. Mollusca

D. Echinodermata

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Polyp phase is absent in

A. Hydra

B. Aurelia

C. Physalia

D. Obelia

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In phylum arthropoda, excretion takes place through

A. nephridia

B. flame cells

C. malphigian tubules

D. gills

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Which of the following statements (i - v) are correct ?
(i) The pelvic fins of female sharks bear claspers.
(ii) In Obelia, polyps produce medusae sexually and medusae form the polyps asexually.
(iii) Flame cells in platyhelminthes help in osmoregulation and excretion.
(iv) In non-chordates, central nervous system is ventral, solid and double.
(v) Pinnae are present in mammals.

A. (ii), (iv) and (v)

B. (i), (iii) and (v)

C. (iii), (iv) and (v)

D. (i), (ii) and (iii)

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Which of the following is not a chordate character?

A. Presence of paired pharyngeal gill slits

B. Ventral heart

C. Solid and ventral nerve cord

D. Presence of post-anal tail

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Which of the following statement(s) is/are correct regarding phylum aschelminthes?
(i) The body is circular in cross-section hence the name roundworms.
(ii) Alimentary canal is complete with a well-developed muscular pharynx.
(iii) Sexes are separate (dioecious), i.e., males and females are distinct.
(iv) Nephridia help in osmoregulation and excretion.

A. (i) and (ii)

B. (iii) and (iv)

C. (i), (ii) and (iii)

D. All of these

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Column I contains zoological names of animals and column II contains their common name. Match the following and choose the correct option.
Column -IColumn- II
A. PhysaliaI. Sea anemone
B. MeandrinaII. Brain coral
C. GorgoniaIII. Sea fan
D. AdamsiaIV. Portuguese man-of-war

A. A III; B II; C I; D IV

B. A IV; B III; C II; D I

C. A IV; B II; C III; D I

D. A II; B III; C I; D IV

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Which of the following possesses electric organs and belongs to class chondrichthyes?

A. Torpedo

B. Petromyzon

C. Trygon

D. Exocoetus

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Which of the following statement(s) is/are correct for class amphibia?
(i) Body is divisible into head and trunk.
(ii) Respiration is through gills only.
(iii) The heart is two chambered i.e. one auricle and one ventricle.
(iv) Fertilization is internal.

A. Only (i)

B. Only (iv)

C. (i), (ii) and (iii)

D. All of these

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Which of the following characteristic distinguish arthropoda from annelids and molluscs ?

A. An external skeleton made of chitin (a polysaccharide) and protein rather than a shell made chiefly of mineral salts.

B. Subdivision of the legs into movable segments.

C. Distinct group of muscles, derived from many body segments, that move the separate parts of the exoskeleton.

D. All of the above