Which one of the following groups of animals is correctly matched with its one characteristic feature without even a single exception?

(1)

Chordata

possess a mouth provided with an upper and a lower jaw

(2)

Chondrichthyes

possess cartilaginous endoskeleton

(3)

Mammalia

give birth to young ones

(4)

Reptilia

possess 3-chambered heart with one incompletely divided ventricle

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One example of animals having a single opening to the outside that serves both as mouth as well as anus is

(1) Octopus

(2) Asterias

(3) Ascidia

(4) Fasciola

Concept Questions :-

Phylum Ctenophora & Platyhelminthes
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Which one of the following statements about all the four of Spongilla, leech, dolphin and penguin is correct?

(1) Penguin is homeothermic while the remaining three are poikilothermic

(2) leech is a fresh water form while all others are marine

(3) Spongilla has special collared cells called choanocytes, not found in the remaining three

(4) All are bilaterally symmetrical

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Which one of the following kinds of animals are triploblastic?

(1) Flat worms

(2) Sponges

(3) Ctenophores

(4) Corals

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Which one of the following statements about certain given animals is correct?

(1) Round worms (Aschelminthes) are pseudocoelomates

(2) Molluscs are acoelomates

(3) Insects are pseudocoelomates

(4) Flat worms (Platyhelminthes) are coelomates

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Which one of the following groups of animals is bilaterally symmetrical and triploblastic?

(1) Coelenterates (cnidarians)

(2) Aschelminthes (round worms)

(3) Ctenophores

(4) Sponges

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Which one of the following pairs of animal comprises ‘jawless fishes’?

(1) Lampreys and eels

(2) Mackerels and rohu

(3) Lampreys and hag fishes

(4) Guppies and hag fishes

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Peripatus is a connecting link between

(1) Ctenophora and Platyhelminthes

(2) Mollusca and Echinodermata

(3) Annelida and Arthropoda

(4) Coelenterata and Porifera

Concept Questions :-

Phylum Annelida
Phylum Arthropoda
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Which one of the following in birds, indicates their reptilian ancestry?

(1) Scales on their hind limbs

(2) Four chambered heart

(3) Two special chambers crop and gizzard in their digestive tract

(4) Eggs with a calcareous shell

Concept Questions :-

Study of Aves & Mammals
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Which one of the following is not a characteristic of phylum-Annelida?

(1) Closed circulatory system

(2) Segmentation

(3) Pseudocoelom

(4) Ventral nerve cord

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