Home
Current Affairs January 2024

What is the correct answer?

4

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

Correct Answer :

B. canal system


Related Questions

What is the correct answer?

4

The spongocoel is lined by choanocytes in

A. Leucosolenia

B. Sycon

C. Euspnongia

D. Grautia

What is the correct answer?

4

Sponges with a skeleton of calcium carbonate belongs to the class

A. calcarea

B. demospongia

C. anthozoa

D. hexactinellida

What is the correct answer?

4

Gemmules are helpful in

A. digestion

B. sexual reproduction

C. asexual reproduction

D. current circulation

What is the correct answer?

4

Lencosolenia is

A. free living, solitary, marine

B. free living, fresh water, solitary

C. free living, colonial, marine

D. Solitary, colonial, fresh water

What is the correct answer?

4

The skeleton of sponges is mostly composed of

A. choanocytes

B. scleroblasts

C. pinacocytes

D. amoebocytes

What is the correct answer?

4

Canal system in Leucosolenia is

A. asconoid

B. syconoid

C. leuconoid

D. rhagon

What is the correct answer?

4

Animals of phylum porifera are characterised by

A. diploblastic organisation

B. coelenteron

C. canal system

D. coelom

What is the correct answer?

4

A sponge is a

A. coelomata

B. acoelomata

C. metacoelomata

D. pseudocoelomates

What is the correct answer?

4

Sycon belongs to the class

A. calcarea

B. porifera

C. hexactinellida

D. demospongia

What is the correct answer?

4

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

What is the correct answer?

4

The commercial bath sponge belongs to

A. porifera

B. gatropoda

C. coelenterata

D. ctenophora

What is the correct answer?

4

Food is stored in-of sponges.

A. trophocytes

B. thesocytes

C. desmocytes

D. archeocytes

What is the correct answer?

4

The scientific name of commercial bath sponge is

A. Cliona

B. Hyalonema

C. Chalina

D. Euspongia

What is the correct answer?

4

Nervous system in sponges

A. is well developed

B. is in the form of a network

C. is made up of several interconnected ganglia

D. is absent

What is the correct answer?

4

The most common composition of skeleton in sponges is :

A. Cartilage

B. Mesenchyma

C. Spicules and spongin fibres

D. Myonemes

What is the correct answer?

4

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

A. Hyalonema

B. Tethya

C. Euplectalla

D. Pheronetna

What is the correct answer?

4

The animal nature of sponges was established by

A. Robert Grant

B. Trembly

C. Robert Brown

D. Ellias

What is the correct answer?

4

Canal system is characteristic of

A. corals

B. sponges

C. sea urchin

D. sea horse

What is the correct answer?

4

Sponges are not found in

A. cold water

B. sea water

C. sandy shore

D. brackish water

What is the correct answer?

4

Sponges capture their food by

A. pinacocytes

B. thesocytes

C. choamocytes

D. scleroblasts

What is the correct answer?

4

The central cavity of the sponge is also called

A. ostea

B. gastral cavity

C. gut

D. gullet

What is the correct answer?

4

The commercial bath sponge is made up of

A. siliceous spicules

B. spongin fibres

C. collagen fibres

D. elastic fibres

What is the correct answer?

4

Ostia are meant to

A. admit water current

B. pass out water current

C. ingest food

D. excrete waste products

What is the correct answer?

4

In leucosolenia, the scleroblasts perform the function of

A. absorption of food material

B. excretion

C. reproduction

D. formation of spicules

What is the correct answer?

4

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

What is the correct answer?

4

The gametes in sponges develop from

A. amoebocytes

B. archeocytes

C. choanocytes

D. myocytes

What is the correct answer?

4

Sponges belong to the phylum

A. sporozoa

B. mastigophora

C. porifera

D. coelenterata

What is the correct answer?

4

One of the internal buds of porifera aris- j ing asexually and coming into activity on I death of parent organism is called

A. gemma

B. gemmule

C. bud

D. bulbul

What is the correct answer?

4

One of the characteristic features of the sponges is the presence of

A. vaselike globular body

B. a central cavity

C. radial symmetry

D. choanocyts

What is the correct answer?

4

The canal system in sponges does not serve the function of

A. nutrition

B. respiration

C. excretion

D. sexual reproduction