Ambulacral grooves are absent in the living forms of the Class

(1) Crinoidea

(2) Asteroidea

(3) Ophiuroidea

(4) Echinodermata

Subtopic:  Phylum Echinodermata |
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Which of the following Phyla are included in Enterozoa?

(1) Annelida, Mollusca, Porifera

(2) Echinodermata, Hemichordata, Porifera

(3) Mollusca, Arthropoda, Hemichordata

(4) Porifera, Mollusca, Arthropoda

Subtopic:  Basis of Classification:I | Basis of Classification:II | Basis of Classification |
 63%
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Hydra receives impulses and stimuli through

(1) nerve net

(2) nematocytes

(3) sensory cells

(4) flame cells

Subtopic:  Phylum Coelenterata |
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Which one feature is common to leech, cockroach and scorpion?

(1) Nephridia

(2) Ventral nerve cord

(3) Cephalisation

(4) Antenna

Subtopic:  Basis of Classification:II | Basis of Classification |
 73%
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Based on cellular mechanisms there are two major types of regeneration found in the animals. Which one of the following is the correct example of the type mentioned?

(1) Morphallaxis - Regeneration of two transversel cut equal pieces of a Hydra into two small Hydras

(2) Epimorphosis - Replacement of old and dead erythrocytes by the new ones

(3) Morphallaxis - healing up of a wound in the skin

(4) Epimorphosis - Regeneration of crushed and filtered out pieces of a Planaria into as many new Planarians

Subtopic:  Phylum Coelenterata |
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Which one of the following groups of structures/organs have similar function?

(1) Typhlosole in earthworm, intestinal villi in rat and contractile vacuole in Amoeba.

(2) Nephridia in earthworm, Malpighian tubules in cockroach and urinary tubules in rat.

(3) Antennae of cockroach, tympanum of frog and clitellum of earthworm.

(4) Incisors of rat, gizzard (proventriculus) of cockroach and tube feet of starfish.

Subtopic:  Phylum Annelida | Phylum Arthropoda |
 77%
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Which one of the following features is common in silverfish, scorpion, dragonfly and prawn?

(1) Two pairs of legs and segmented body

(2) Living chitinous cuticle and two pairs of antennae

(3) Jointed appendages and chitinous exoskeleton

(4) Closed blood circular system

Subtopic:  Phylum Arthropoda |
 85%
From NCERT
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Which one of the following is correctly matched with its one characteristic and the taxon?

Animals Characteristic Taxon
1.   Millipede Ventral nerve cord Arachnida
2. Duckbill platypus      Oviparous Mammalia
3. Silverfish Pectoral and pelvic fins      Chordata
4. Sea anemone Triploblastic Cnidaria
Subtopic:  Phylum Chordata |
 79%
From NCERT
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All mammals without any exception are characterised by

(1) viviparity and biconcave red blood cells

(2) extra-abdominal testes and a four chambered heart

(3) heterodont teeth and 12 pairs of cranial nerves

(4) a muscular diaphragm and milk producing glands

Subtopic:  Study of Aves & Mammals |
 74%
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A lizard-like member of reptilia is sitting on a tree with its tail coiled around a twig. This animal could be

(1) Hemidactylus showing sexual dimorphism

(2) Varanus showing mimicry

(3) garden lizard (Calotes) showing camouflage

(4) Chamaeleon showing protective colouration

Subtopic:  Study of Reptilia |
 66%
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