Eggs and Sperm are produced by the same individual in case of

(1) Leech

(2) Sponges

(3) Pleurobrachia

(4) All of the above

Subtopic:  Phylum Porifera | Phylum Ctenophora & Platyhelminthes | Phylum Annelida |
 63%
From NCERT
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The digestive system in Meandrina is

(1) Digestion is extracellular only

(2) Digestion is intracellular only

(3) Digestion is both extracellular and intracellular

(4) Digestion absent as it is a parasite

Subtopic:  Phylum Coelenterata |
 86%
From NCERT
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Both polyp and medusa life forms are present in the life cycle of

(1) Obelia

(2) Physalia

(3) Aurelia

(4) Adamsia

Subtopic:  Phylum Coelenterata |
 86%
From NCERT
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The skeleton of corals is made up of

(1) Calcium silicate

(2) Calcium phosphate

(3) Hydroxyapatite

(4) Calcium carbonate

Subtopic:  Phylum Coelenterata |
 88%
From NCERT
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Which of the following group consists exclusively of cnidarians?

(1) Aplysia, Gorgonia, Spongilla, Hydra

(2) Hydra, pennatula, obelia, Echinus

(3) Hydra, obelia, adamsia, physalia

(4) Scypha, Hydra, adamsia, physalia

Subtopic:  Phylum Coelenterata |
 90%
From NCERT
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Ctenophora is an exclusively marine phylum, the other such phylum is

(1) Mollusca

(2) Echinodermata

(3) Porifera

(4) Coelenterata

Subtopic:  Phylum Ctenophora & Platyhelminthes |
 73%
From NCERT
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Ctenophorans are commonly referred to as

(1) Flatworms

(2) Comb jellies

(3) Sea anemone

(4) Cnidaria

Subtopic:  Phylum Ctenophora & Platyhelminthes |
 88%
From NCERT
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The number of ciliated rows present in Comb jellies are

(1) 8

(2) 6

(3) 4

(4) 9

Subtopic:  Phylum Ctenophora & Platyhelminthes |
 94%
From NCERT
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The function of flame cells are

(1) Digestion and excretion

(2) Attachment and osmoregulation

(3) Anchorage and excretion

(4) Excretion and osmoregulation

Subtopic:  Phylum Ctenophora & Platyhelminthes |
 89%
From NCERT
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Presence of flame cells is a characteristic feature of

(1) Nereis

(2) Taenia

(3) Hirudinaria

(4) Pheretima

Subtopic:  Phylum Ctenophora & Platyhelminthes |
 87%
From NCERT
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