Select the incorrect statement.

(1) Periplaneta has compound eyes.

(2) Earthworm shows segmentation.

(3) Ascaris shows sexual dimorphism

(4) Liver fluke has a complete alimentary canal

Subtopic:  Phylum Ctenophora & Platyhelminthes |
 80%
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Which of the following waste products in grasshopper is not excreted and is used in other metabolic activities?

(1) Carbon dioxide

(2) Water

(3) Uric acid

(4) Faeces

Subtopic:  Phylum Arthropoda |
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Select the animal that exhibits retrogressive metamorphosis.

(1) Bufo

(2) Amphioxus

(3) Limulus

(4) Herdmania

Subtopic:  Phylum Chordata |
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Which one of the following is not a mammalian character?

(1) Presence of milk producing glands

(2) Skin is unique in possessing hair

(3) Presence of external ears called pinnae

(4) Homodont type of dentition

Subtopic:  Study of Aves & Mammals |
 87%
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Retrogressive metamorphosis occurs in

(1) Hemichordata

(2) Cephalochordata

(3) Urochordata

(4) Vertebrata

Subtopic:  Phylum Echinodermata |
 62%
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Some salient features and phyla of organisms are given below. Select the option which shows the correct combination of organism, its phylum and salient features.

1. Hydra Coelenterata Bilateral symmetry Cnidoblasts present
2. Planaria Platyhelminthes    Bilateral symmetry    High regeneration capacity
3. Ancylostoma    Annelida Bilateral symmetry Elongated and worm shape
4. Octopus Mollusca Radial symmetry External skeleton of shell present
Subtopic:  Phylum Ctenophora & Platyhelminthes |
 81%
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Select the correct statement regarding reproduction.

(1) Mating in dogs is synchronised with lunar cycle.

(2) Salamanders always have internal fertilisation.

(3) In Trygon, the male introduces sperms into female through a modified pelvic fin.

(4) Catla has internal fertilisation.

Subtopic:  Comparative study of Cartilagenous & Bony Fishes |
 69%
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Select the option that correctly matches characteristic features with the group of three animals.

(1) Skeleton of spicules − Sycon, Adamsia, Spongilla

(2) Excretion by flame − Taenia, Fasciola, Ancylostoma

(3) Mouth contains radula −  Dentalium, Octopus, Ophiura

(4) Jointed appendages −  Limulus, Apis, Laccifer

Subtopic:  Phylum Arthropoda |
 81%
From NCERT
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Among which of the animals urinary bladder is absent?

(1) Frog

(2) Crow

(3) Ostrich

(4) Camel

Subtopic:  Study of Aves & Mammals |
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Gemmule formation is a common mode of asexual reproduction in

(1) Paramecium

(2) Hydra

(3) sponges

(4) yeast

Subtopic:  Phylum Porifera |
 82%
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