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Identify the correct characteristics of porifera.

  1. Commonly known as sea walnuts.

  2. Presence of ostia and collar cells.

  3. Exhibit tissue level of characteristics. 

  4. It is the largest phylum of animal kingdom.

  5. The body is supported by spicules and sponging fibers.

  6. Contains cnidocytes which is used for defense, anchorage and capturing of prey.

A. (ii), (v) only

B. (i), (ii), (vi) only

C. (i), (ii), (iii), (iv) only

D. All of these.

Correct Answer :

A. (ii), (v) only


Porifera is commonly referred to as sponges. They are multicellular organisms that have bodies full of pores and channels allowing water to circulate through them, consisting of jelly-like mesohyl sandwiched between two thin layers of cells.

Related Questions

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4

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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4

Meandrina (brain coral) belongs to phylum

A. porifera

B. coelenterata

C. ctenophora

D. platyhelminthes

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4

Which of the following statement(s) is/are correct regarding class aves?
(i) The forelimbs are modified into wings and the hindlimbs generally have scales and are modified for walking, swimming or clasping the tree branches.
(ii) Heart is completely four-chambered.
(iii) They are warm- blooded (homoiothermous) animals i.e., they are able to maintain a constant body temperature.
(iv) They are oviparous and development is direct.

A. Both (i) and (iii)

B. Both (i) and (iv)

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

D. All of these

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4

Which of the following statements (i – v) are incorrect ?

  1. Circulatory system in arthropods is of closed type.

  2. Parapodia in annelids helps in swimming.

  3. Phylum mollusca is the second largest animal phylum.

  4. Aschelminthes are dioecious.

A. (i) only

B. (iii) only

C. (i) and (iii)

D. (iii) and (iv)

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4

Which of the following statement(s) is/are correct regarding phylum coelenterata?
(i) They are aquatic, mostly marine, sessile or freeswimming, radially symmetrical animals.
(ii) They have a central gastro-vascular cavity with a single opening called hypostome.
(iii) Digestion is extracellular and intracellular.
(iv) Examples are Sycon, Spongilla and Euspongia.

A. (i) and (ii)

B. (i) and (iv)

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

D. All of these

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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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4

Select the incorrect feature of mollusca from the given statements.

  1. Terrestrial or aquatic animals having cellular system level of organization.

  2. Radial symmetrical and acoelomate animals and possesses two germinal layers.

  3. A file like rasping organ called radula is present.

  4. Usually dioecious and viviparous animals.

  5. Examples include Pila, Octopus, and Dentalium.

A. (i) and (ii) only

B. (ii) and (iv) only

C. (i), (ii) and (iv) only

D. All the five statements.

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4

Which of the following statements is without exception in sponges ?

A. They all have calcareous spicules.

B. They have high regenerative power.

C. They are found only in marine water.

D. They are all radially symmetrical.

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4

A student was given a specimen to identify on the basis of the characteristics given below.
(i) They are metamerically segmented.
(ii) Presence of closed circulatory system.
(iii) They have circular and longitudinal muscles for locomotion. Identify the specimen.

A. Prawn

B. Pheretima

C. Wuchereria

D. Ctenoplana

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Which of the following is a chordate feature and not shared by the non-chordates ?

A. Metamerism

B. Axial organization

C. Bilateral symmetry

D. Pharyngeal gill slits

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4

Which of the following group of animals reproduces only by sexual means?

A. Ctenophora

B. Cnidaria

C. Porifera

D. Protozoa

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4

The figure given below is the characteristic structure of the phylum in which animals are aquatic, free swimming or sessile, mostly marine, radially symmetrical. Identify the phylum and correct function of the structure. 
akimg15

A. Ctenophora; Emission of light.

B. Porifera; Feeding, respiration and excretion.

C. Cnidarian; Anchorage, Defense and food capturing

D. Mollusca; Locomotion, transport of food and respiration.

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4

Examine the figures A, B and C. In which one of the four options all the items A, B and C are correctly identified ? 
akimg4

A. A - Sycon, B - Euspongia, C - Spongilla

B. A - Euspongia, B - Spongilla, C - Sycon

C. A - Spongilla, B - Sycon, C - Euspongia

D. A - Euspongia, B - Sycon, C - Spongilla

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4

Which of the following is not the common fundamental feature for animal classification?

A. Germinal layers.

B. Pathway of water transport.

C. Pattern of organization of cells.

D. Serial repetition of the segments.

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4

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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4

Identify the figures A, B and C and choose the correct option. 
akimg7

A. A - Male Ascaris, B - Hirudinaria (leech), C- Nereis

B. A - Female Ascaris, B - Nereis, C-Hirudinaria (leech)

C. A - Female Ascaris B- Hirudinaria (leech), C - Nereis

D. A - Male Ascaris, B - Nereis, C- Hirudinaria (leech)

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4

Identify the animals shown in the given figures A, B and C from options given below. 
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A. A - Octopus; B -Asterias, C- Ophiura

B. A - Asterias; B - Ophiura, C- Octopus

C. A - Echinus; B - Octopus C - Ophiura

D. A - Ophiura; B - Echinus, C- Octopus

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4

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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4

Which of the following is a living fossil?

A. Balanoglossus

B. Echinus

C. Ancylostoma

D. Limulus

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4

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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4

When any plane passing through the central axis of the body divides the organism into two identical halves, the organism is called ___________.

A. radially symmetrical

B. bilaterally symmetrical

C. asymmetrical

D. metamerically segmented

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4

Match the terms/feature given in column I with their examples given in column II and select the correct match from the option given below.
Column-IColumn-II
(Term/Feature)(Examples)
A. Gregarious pesti. Hirudinaria
B. Vectorii. Planaria
C. Oviparous withiii. Sepia indirect development
D. Metameresiv. Aedes
E. High regenerationv. Locust capacity

A. A - i, B - ii, C - iii, D - iv, E - v

B. A - iii, B - v, C - ii, D - iv, E - i

C. A - iii, B - i, C - v, D - ii, E - iv

D. A - v, B - iv, C - iii, D - i, E - ii

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4

Which of the following phylum is being described by the given statements?
(i) These are primitive multicellular animals and have cellular level of organization.
(ii) Digestion is intracellular.
(iii) They have a water transport or canal system.
(iv) They reproduce asexually by fragmentation and sexually by formation of gametes.

A. Porifera

B. Ctenophora

C. Coelenterata

D. Platyhelminthes

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4

Identify the figure with its correct name and phylum. 
akimg6

A. Sycon - Porifera

B. Aurelia - Coelenterata

C. Pleurobrachia - Ctenophora

D. Tapeworm - Platyhelminthes

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4

Flame cells present in platyhelminthes, are specialized in

A. respiration and absorption.

B. osmoregulation and circulation.

C. respiration and excretion.

D. osmoregulation and excretion.

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4

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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4

Which one of the following groups of animals is correctly matched with its characteristic feature without even a single exception ?

A. Reptilia : possess 3 - chambered heart with one incompletely divided ventricle.

B. Chordata : Possess a mouth provided with an upper and lower jaw.

C. Chondrichthyes : Possess cartilaginous endoskeleton.

D. Mammalia : Give birth to young one.

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4

Which of the following animal's body is covered by calcareous shell and unsegmented with a distinct head, muscular foot, and visceral hump? 
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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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4

Polyp phase is absent in

A. Hydra

B. Aurelia

C. Physalia

D. Obelia

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4

The following statement are associated with the occurrence of notochord. Identify the incorrect statement.

A. It is present only in larval tail in ascidians.

B. It is replaced by a vertebral column in adult frog.

C. It is absent throughout the life in humans from the very beginning.

D. It is present throughout life in Amphioxus.