02. Porifera
Animal kingdom

261543 During unfavourable conditions, the sponges form

1 spicule
2 cyst
3 encyst
4 gemmule
Animal kingdom

261546 In case of poriferans the spongocoel is lined with flagellated cells called :

1 Ostia
2 Oscula
3 Choanocytes
4 Mesenchymal cells
Animal kingdom

261548 Study the following table and pick up the incorrect combination (s).

S. No.GroupSalient featureExample
I)CyclostomataAbsence of renal portal systemLamprey
II)GnathostomataInternal ears with three semi circular canals eachLanselet
III)ChondrichthyesHeterocercal caudal finTorpedo
IV)OsteichthyesAbsence of air bladderCatla

1 I, II
2 II, IV
3 II, III
4 I, IV
Animal kingdom

261549 Sponges that contain calcareous spicules and live in shallow marine waters are included under the class

1 Calcarea
2 Demospongia
3 Hexactinellida
4 Scyphozoa
Animal kingdom

261555 The phenomenon of regeneration in sponges was observed and explained by :

1 H.W. Wilson
2 Aristotle
3 Robert Grant
4 Ellis
Animal kingdom

261543 During unfavourable conditions, the sponges form

1 spicule
2 cyst
3 encyst
4 gemmule
Animal kingdom

261546 In case of poriferans the spongocoel is lined with flagellated cells called :

1 Ostia
2 Oscula
3 Choanocytes
4 Mesenchymal cells
Animal kingdom

261548 Study the following table and pick up the incorrect combination (s).

S. No.GroupSalient featureExample
I)CyclostomataAbsence of renal portal systemLamprey
II)GnathostomataInternal ears with three semi circular canals eachLanselet
III)ChondrichthyesHeterocercal caudal finTorpedo
IV)OsteichthyesAbsence of air bladderCatla

1 I, II
2 II, IV
3 II, III
4 I, IV
Animal kingdom

261549 Sponges that contain calcareous spicules and live in shallow marine waters are included under the class

1 Calcarea
2 Demospongia
3 Hexactinellida
4 Scyphozoa
Animal kingdom

261555 The phenomenon of regeneration in sponges was observed and explained by :

1 H.W. Wilson
2 Aristotle
3 Robert Grant
4 Ellis
Animal kingdom

261543 During unfavourable conditions, the sponges form

1 spicule
2 cyst
3 encyst
4 gemmule
Animal kingdom

261546 In case of poriferans the spongocoel is lined with flagellated cells called :

1 Ostia
2 Oscula
3 Choanocytes
4 Mesenchymal cells
Animal kingdom

261548 Study the following table and pick up the incorrect combination (s).

S. No.GroupSalient featureExample
I)CyclostomataAbsence of renal portal systemLamprey
II)GnathostomataInternal ears with three semi circular canals eachLanselet
III)ChondrichthyesHeterocercal caudal finTorpedo
IV)OsteichthyesAbsence of air bladderCatla

1 I, II
2 II, IV
3 II, III
4 I, IV
Animal kingdom

261549 Sponges that contain calcareous spicules and live in shallow marine waters are included under the class

1 Calcarea
2 Demospongia
3 Hexactinellida
4 Scyphozoa
Animal kingdom

261555 The phenomenon of regeneration in sponges was observed and explained by :

1 H.W. Wilson
2 Aristotle
3 Robert Grant
4 Ellis
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Animal kingdom

261543 During unfavourable conditions, the sponges form

1 spicule
2 cyst
3 encyst
4 gemmule
Animal kingdom

261546 In case of poriferans the spongocoel is lined with flagellated cells called :

1 Ostia
2 Oscula
3 Choanocytes
4 Mesenchymal cells
Animal kingdom

261548 Study the following table and pick up the incorrect combination (s).

S. No.GroupSalient featureExample
I)CyclostomataAbsence of renal portal systemLamprey
II)GnathostomataInternal ears with three semi circular canals eachLanselet
III)ChondrichthyesHeterocercal caudal finTorpedo
IV)OsteichthyesAbsence of air bladderCatla

1 I, II
2 II, IV
3 II, III
4 I, IV
Animal kingdom

261549 Sponges that contain calcareous spicules and live in shallow marine waters are included under the class

1 Calcarea
2 Demospongia
3 Hexactinellida
4 Scyphozoa
Animal kingdom

261555 The phenomenon of regeneration in sponges was observed and explained by :

1 H.W. Wilson
2 Aristotle
3 Robert Grant
4 Ellis
Animal kingdom

261543 During unfavourable conditions, the sponges form

1 spicule
2 cyst
3 encyst
4 gemmule
Animal kingdom

261546 In case of poriferans the spongocoel is lined with flagellated cells called :

1 Ostia
2 Oscula
3 Choanocytes
4 Mesenchymal cells
Animal kingdom

261548 Study the following table and pick up the incorrect combination (s).

S. No.GroupSalient featureExample
I)CyclostomataAbsence of renal portal systemLamprey
II)GnathostomataInternal ears with three semi circular canals eachLanselet
III)ChondrichthyesHeterocercal caudal finTorpedo
IV)OsteichthyesAbsence of air bladderCatla

1 I, II
2 II, IV
3 II, III
4 I, IV
Animal kingdom

261549 Sponges that contain calcareous spicules and live in shallow marine waters are included under the class

1 Calcarea
2 Demospongia
3 Hexactinellida
4 Scyphozoa
Animal kingdom

261555 The phenomenon of regeneration in sponges was observed and explained by :

1 H.W. Wilson
2 Aristotle
3 Robert Grant
4 Ellis