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Sponges capture their food by

A. pinacocytes

B. thesocytes

C. choamocytes

D. scleroblasts

Correct Answer :

C. choamocytes


Related Questions

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Difference between a sponge and a metazoan is that sponge do not contain

A. cells

B. cell organisation

C. cell division

D. division of labour

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Choanocytes in sponges are present

A. on the external body surface

B. line the gastric cavity

C. located between the outer and inner layers

D. in the mesodermal layer

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The commercial bath sponge is made up of

A. siliceous spicules

B. spongin fibres

C. collagen fibres

D. elastic fibres

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Which is not a larva of sponge?

A. Planula

B. Stomogastrula

C. Amphiblastula

D. Terogastrula

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The animal nature of sponges was established by

A. Robert Grant

B. Trembly

C. Robert Brown

D. Ellias

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A chamber which is common in different types of canal system:

A. Radial canal

B. Inhalant canal

C. Spongocoel

D. None of these

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Sponges capture their food by

A. pinacocytes

B. thesocytes

C. choamocytes

D. scleroblasts

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4

The phylum porifera contains most primitive of multicellular animals called

A. corals

B. sea pen

C. comb jellies

D. sponges

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The larva of Sycoti is

A. parenchyma

B. alanula

C. redia

D. amphib las tula

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Sponges are not found in

A. cold water

B. sea water

C. sandy shore

D. brackish water

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Which of the following is given as a gift in Japan?

A. Hyalonema

B. Tethya

C. Euplectalla

D. Pheronetna

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The central cavity of the sponge is also called

A. ostea

B. gastral cavity

C. gut

D. gullet

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The commercial bath sponge belongs to

A. porifera

B. gatropoda

C. coelenterata

D. ctenophora

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Cells that aid in locomotion of a sponge are

A. porocytes

B. myocytes

C. choanocytes

D. none of these

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Sponges with a skeleton of calcium carbonate belongs to the class

A. calcarea

B. demospongia

C. anthozoa

D. hexactinellida

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The skeleton of sponges is mostly composed of

A. choanocytes

B. scleroblasts

C. pinacocytes

D. amoebocytes

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Sycon belongs to the class

A. calcarea

B. porifera

C. hexactinellida

D. demospongia

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The scientific name of commercial bath sponge is

A. Cliona

B. Hyalonema

C. Chalina

D. Euspongia

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Phylogenetically, the sponges have evolved from

A. protozoans

B. flagellates

C. choano flagellate

D. ciliates

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Sponges belong to the phylum

A. sporozoa

B. mastigophora

C. porifera

D. coelenterata

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A sponge is a

A. coelomata

B. acoelomata

C. metacoelomata

D. pseudocoelomates

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Path of water in a sponge is

A. pinacocyte � choanocyte � osculum

B. osculum > spongocoel � ostia

C. ostia > spongocoel � osculum

D. osculum � ostia > spongocoel

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The skeleton in sponges is composed of

A. gemmules

B. spicules

C. spongin fibre

D. trychocysts

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The pathway of entring and coming out of water of sponges is

A. water vascular system

B. canal system

C. feeding current

D. circulating current

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The gametes in sponges develop from

A. amoebocytes

B. archeocytes

C. choanocytes

D. myocytes

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The most common composition of skeleton in sponges is :

A. Cartilage

B. Mesenchyma

C. Spicules and spongin fibres

D. Myonemes

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Which of the following statements is true of sponges ?

A. One mouth and innumerable exits

B. Mouth serves for both, ingestion and egestion

C. Innumerable mouths and one exit

D. The body encloses a single cavity the coeienteron

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If a carmine particle is put on the os~ culum of a living sponge, it will

A. adhere

B. rotate

C. be ingested

D. none of these

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Asexual reproduction in sponges is by forming buds and

A. gemmules

B. spicules

C. spongin fibres

D. choanocytes

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Ostia are meant to

A. admit water current

B. pass out water current

C. ingest food

D. excrete waste products