Porifera Objective Type Questions and Answers

Questions

21 A Common Chamber In Sponges Is

A Spongoceol

B Incurrent Canal

C Radial Canal

D Excurrent Canals

View Answer

Answer: Spongoceol

22 A Dried Piece Of Sponge Is Composed Of

A Spongin Fibres

B Cellulose Fibres

C Silk Fibres

D Elastic Fibres

View Answer

Answer: Spongin Fibres

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23 Many Sponges May Be Bigger Than Fishes, Yet They Do Not Have Respiratory Organs Because They

A Have Porous Body

B Are Sedentary

C Respire Anaerobically

D Do Not Require Them

View Answer

Answer: Have Porous Body

24 Which Is Correct In Sponges

A Single Exit Innumerable Mouths

B Single Mouth Innumerable Exits

C A True Coelom

D Radial Symmetry

View Answer

Answer: Single Exit Innumerable Mouths

25 Difference Between Sponges And Other Metozoa Is

A Sponges Possess Cellular Level Of Organisation

B Sponges Do Not Contain Blood

C Sponges Do Not Have Cell Division

D Sponges Do Not Have Division Of Labour

View Answer

Answer: Sponges Possess Cellular Level Of Organisation

26 Mesohyl Layer Of Sponges Is

A Gelatinous

B Nonliving

C Noncellular

D All The Above

View Answer

Answer: All The Above

27 Choanocytes Are

A Biflagellate

B Tetraflagellate

C Uniflagellate

D Multiflagellate

View Answer

Answer: Uniflagellate

28 Mesogloea Of Sponges Consists Of

A Spicules

B Fibres

C Gelatinous Matrix

D All The Above

View Answer

Answer: All The Above

29 Myocytes Of Sponges Are Modified

A Pinacocytes

B Choanocytes

C Amoebocytes

D Gland Cells

View Answer

Answer: Pinacocytes

30 Myocytes Of Sponges Show

A Secretion Of Fibres

B Nervous Excitation

C Contractibility

D All The Above

View Answer

Answer: Contractibility

31 Germ Cells Of Sponges Are Formed By

A Archaeocytes

B Pinacocytes

C Collencytes

D Choanocytes

View Answer

Answer: Archaeocytes

32 A Sponge Can Be Distinguished From Other Animals By The Presence Of

A Choanocytes

B Hollow Body

C Coelenteron

D Dermal Papillae

View Answer

Answer: Choanocytes

33 Larva Of Sponge Is Known As

A Amphiblastula Larva

B Planula Larva

C Trochophore Larva

D Glochidium Larva

View Answer

Answer: Amphiblastula Larva

34 Gemmules Are Helpful In

A Survival In Drought

B Digestion

C Sexual Reproduction

D Secretion Of Spicules

View Answer

Answer: Survival In Drought

35 Sycon Belong To The Class

A Hexactinellida

B Desmospongia

C Porifera

D Calcarea

View Answer

Answer: Calcarea

36 The Only Fresh Water Species Of Sponges Is

A Spongilla

B Scypha

C Euspongia

D Oscarella

View Answer

Answer: Spongilla

37 Common Bath Sponge Is

A Euspongia

B Euplectella

C Spongilla

D Syon

View Answer

Answer: Euspongia

38 The Study Of Sponges Is Called

A Parazoology

B Protozoology

C Nematology

D None of the above

View Answer

Answer: Parazoology

39 Boring Sponge Is

A Cliona

B Hyalonema

C Chalina

D Spongilla

View Answer

Answer: Cliona

40 Flagellate Larva Of Sponges Is

A Planaria

B Planula

C Amphiblastula

D none of the above

View Answer

Answer: Amphiblastula

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