1. OBJECTIVE QUESTIONS
FOR
NEET AIIMS JIPMER

2. BIOLOGY
ANIMAL KINGDOM
SET 1
MCQ’S

3. Q1. Feet of king fisher are modified for
Wading
Perching
Running
Catching

4. ANSWER(A) EXPLANATION
Hind limbs are variously modified for various functions like perching, grasping etc. In the kingfisher they are modified for wading.
The legs and toes are exceptionally long and slender and serve to walk over aquatic vegetation or marshes.

5. Q2. Bird vertebrae are
acoelous
heterocoelous
amphicoelous
procoelous.

6. ANSWER (B) EXPLANATION
Bird vertebrae are heterocoelous i.e., the centra of vertebrae have saddle – shaped ends. Acoelous refers to vertebrae that are flat on both ends (mammals).  
Amphicoelous means both ends of the centrum are concave (fish). Procoelous means concave in front and convex in back (anurans and reptiles).

7. Q3. Hair occur in all mammals except those of
Rodentia
Chiroptera
Primata
Cetacea.

8. ANSWER (D) EXPLANATION
Order cetacea includes whales, dolphins and porpoises. These are the most highly modified mammals.
They have a fish-like body with smooth, hairless skin devoid of sweat and oil glands, far posterior nares, small eyes, minute ear openings without pinnae, paddle-like forelimbs, no hindlimbs, abdominal testes and flattened tail ending in two horizontal flaps or flukes.

9. Q4. Phenomenon of organisms resembling others for escaping from enemies is
Adaptation
Mimicry
Homology
Analogy.

10. ANSWER (B) EXPLANATION
Mimicry is resemblance of one species with another in order to obtain advantage, especially, against predation. The species which is imitated is called model while the animal which imitates is known as mimic or mimic tic.
Model is either ferocious or distasteful to predator. Adaptation is any quality of the organism (morphological, physiological, and behavioral) that enables the organism to survive and reproduce in its habitat.
Mimicry is an example of adaption. Homology is the phenomenon in which origin of organs is same but functions are different and analogy is the phenomenon in which origin of organs is different but functions are same.

11. Q5. Fish which can be used in biological control of mosquitoes / Larvicidal fish is
Eel
Carp
Cat fish
Gambusia.

12. ANSWER (D) EXPLANATION
Gambusia is a species of freshwater fish. It is remarkably hardy, surviving in waters of very low oxygen saturations, high salinities and high temperatures.
For these reasons, this species may now be the most widespread freshwater fish in the world, having being introduced as a biocontrol in certain countries to control mosquitoes. It feeds on larval and pupal stages of mosquitoes.

13. Q6. Jelly fish belongs to class
Hydrozoa
scyphozoa
anthozoa
None of these.

14. ANSWER (B) EXPLANATION
Jelly fish belongs to the class scyphozoa of the phylum cnidaria. Its genus is Aurelia. Amelia is found in the coastal waters of the tropical and temperate seas.  
Aurelia may float passively or swim actively, singly or in shoals. It is carnivorous and unisexual. Aurelia has a soft, gelatinous, saucer-like body. Its margin bears numerous short tentacles and 8 sense organs, called rhopalia, in notches of the margin.
Each sense organ is enclosed by a pair of leaf-like lappets. At the centre of the lower (subumbrellar) surface is the squarish mouth surrounded by 4 long oral arms.

15. Q7. Transfer of Taenia to secondary host occurs as
Oncosphere
Cysticercus
Morula
Egg.

16. ANSWER (A) EXPLANATION
Eggs of Taenia undergo cleavage to form morula. Morula, at its morphologically posterior end, develops three pairs of chitinous hooks secreted by differentiated cells, called onchoblasts.
The six-hooked embryo, called hexacanth, possesses a pair of large penetration glands; it is surrounded by two hexacanth membranes. The hexacanth, together with all the membranes surrounding it, is known as onchosphere.
The secondary or intermediate host acquires infection by ingesting the onchospheres. Pig, which regularly feeds on human excreta, is the usual secondary host, but dog, monkey and sheep are also known to get the infection.
Man himself may serve as the secondary host by ingesting onchospheres with inadequately cooked or raw vegetables.

17. Q8. Photoreceptors of earthworm occur on
Clitella
Many eyes
Dorsal surface
Lateral sides.

18. ANSWER (C) EXPLANATION
Poto-receptors restricted only to dorsal surface, are more numerous on prostomium and peristomium of earthworm and gradually reduce in number towards posterior end of body. They are totally absent in clitella.
Each photoreceptor consists of a single ovoid cell, with a nucleus and clear cytoplasm containing a network of neurofibrillae and a small transparent L-shaped lens or optic organelle or phaosome, made up of a hyaline substance.
Photoreceptors enable worms to judge the intensity and duration of light.

19. Q9. Earthworms are Useful Harmful More useful than harmful
More harmful.

20. ANSWER (A) EXPLANATION
Earthworms are very useful. All over the world they are used as bait for fishing. Earthworms are in general beneficial to agriculture. Their habit of burrowing and swallowing earth increases fertility of soil in many ways.
Their burrows permit penetration of air and moisture in porous soil, improve drainage, and make easier the downward growth of roots. Excretory wastes and other secretions of worms also enrich soil by adding nitrogenous matters that form important plant food.
Earthworms were used variously as medicines in the past. Earthworms were used to cure stones in bladder, yellowness of jaundice, pyorrhea, piles, rheumatism or gout, diarrhoea. Earthworms are easily obtained and are of convenient size for dissections.

21. Q10. A chordate character is
Gills
Spiracles
Post-anal tail
chitinous exoskeleton.

22. ANSWER (C) EXPLANATION
The diagnostic characters of chordates are notochord.- Dorsal hollow nerve cord, pharyngeal slits and post anal tail. Tail is the part of the body behind the cloacal or anal opening.
It contains skeletal elements, muscles, blood vessels and nerves but no viscera. It provides much of propulsive force in aquatic species. The tail is reduced or absent in the adults of some chordates.

23. Q11 Which of the following are correct?
Diploblastic :
Poriferans, Coelenterates
(ii)
Triploblastic
Platyhelminthes to Chordates
(iii)
Acoelomata
Poriferans, Coelenterates, Platyhelminthes
(iv)
Pseudocoelomata
Aschelminthes/Roundworms
(v)
Eucoelomata
Annelids to Chordates
None of these
All of these
(i), (ii) and (v) correct
(iii) and (v) are correct

24. ANSWER (B) EXPLANATION
Animals belonging to phyla platyhelminthes to Chordata are triploblastic while poriferans and cnidarians are diplob astic. Sponges, cnidarians, cternophorans and platyhelmintns are acolomates, aschelminthes are pseudocolomats and annelids, arthropods, echinoderms and chordates are eucoelomates. Eucoelomates have true coelom.

25. Q12. Which one of the following is a matching set of a phylum and its three examples?
Porifera – Spongilla, Euplectella, Pennatula
Cnidaria – Bonellia, Physalia, Aurelia
Platyhelminthes – Planaria, Schiestosoma, Enterobius
Mollusca – Loligo, Teredo, Octopus

26. ANSWER (D) EXPLANATION
Phylum Mollusca includes those animals which have a soft body, usually furnished with a shell. The body is divided into a head, muscular foot andvisceral mass Loligo (squid), Teredo (shipworm) and Octopus are some of its examples.

27. Q13. What is true about Nereis, scorpion, cockroach and silver fish?
They all possess dorsal heart.
None of them is aquatic.
They all belong to the same phylum.
They all have jointed paired appendages.

28. ANSWER (A) EXPLANATION
Nereis belongs to phylum Annelida and scorpion, cockroach and silver fish belong to phylum Arthopda. They all possess dorsal heart.

29. Q14. Which one of the following groups of three animals is correctly matched with their one characteristic morphological feature?

30. ANSWER (A) EXPLANATION
Scorpion, spider and cockroach are invertebrates and belong to the phylum Arthropoda, therefore they have ventral solid central nervous system. In cockroach and locust, the body is segmented externally. In Taenia, the body is without true segments. Liver fluke has bilateral symmetry, sea anemone has radial symmetry and sea-cucumbers has bilateral symmetry in larval form and radial symmetry in adult form. Centipede and prawn have jointed appendages while sea urchin does not have jointed appendages.

31. Q15. Bilateral symmetry, metameric segmentation, coelom and open circulatory system characterize which of the following phylum?
Annelida
Mollusca
Arthropoda
Echinodermata

32. ANSWER (C) EXPLANATION
Arthropods show various body shapes with bilateral symmetry. They show incomplete metameric segmentaion. They have true coelom containing haemocoel. In arthropods, blood vascular/circulatory ststem is of open type where blood flows in haemocoel instead of blood vessels.

33. Q16. Match the animal names listed under Column-I with the zoological names given under Column-II and select the correct option from the codes given below.
Common Name
Zoological Name A
Star fish
(i)
Sepia B
Jelly fish
(ii)
Astropecten C
Devil fish
(iii)
Aurelia D
Cuttle fish
(iv)
Octopus Hippocampus
A-(ii), B-(iii), C-(iv), D-(i)
A-(iii), B-(iv), C-(i), D-(v)
A-(ii), B-(i), C-(iv), D-(iii)
A-(v), B-(i), C-(iv), D-(ii)

34. ANSWER (A) EXPLANATION

35. Q17. Which one of following statements about certain given animals is correct?
Round worms are pseudo-coelomates
Molluscs are acoelomates
Insects are pseudo-coelomates
Flatworms are coelomates

36. ANSWER (A) EXPLANATION
Abody cavity can mean any internal space, or a series of spaces present inside body, whereas coelom or true body cavity generally refers to a large fluid-filled space (cavity) lying between the outer body wall and the inner digestive tube. In acoelomates, no body cavity or coelom is present. Embryonic mesoderm remains as a solid layer, space between endoderm (gut wall) and ectoderm (body wall) is filled with mesenchyme and muscle fibres. In pseudocoelomates, body space is a pseudocoelom or false coelom. In coelomates or eucoelomates, body space is a true coelom, enclosed by mesoderm on both sides. Aschelminthes are pseudocoelomates. Molluscs and insects are coelomates while flatworms are acoelomates.

37. Q18. Which of the following is not correct match of animal and its habitat?
Hydra vulgaris sea water
Hydra gangetica fresh water
Obelia sea water
Physalia sea water

38. ANSWER (A) EXPLANATION
Hydra vulgaris is a small fresh water hydroid with 4-12 tentacles that protrude from outside the mouth.
Ingestion and egestion occur through the mouth.
1. tentacle; 2. hypostome; 3. nematocytes; 4. gastrum; 5. Foot

39. Q19. Which is not correct for sponges?
Internal fertilization
External fertilization
Gemmule formation
Gametes are formed form epidermal cells

40. ANSWER (B) EXPLANATION
In sponges, sexes are not separate (hermaphrodite) i.e., eggs and sperms are produced by the same individuals. Sperms leave on sponge and enter another with water current to fertillze the ova (eggs) in situ. Thus, tertilization is internal.

41. Q20. Which of the following have body and are diploblastic?
Aurelia and Obelia
Adamsia and Euplectella
Leucosolenia and Spongilla
Sycon and Hydra

42. ANSWER (C) EXPLANATION
Leucosolenia and Spongilla belong to the phylum porifera and thus have porous body (body is provided with pores) and are diploblastic (i.e. derived from two germ layer – ectoderm and endoerm)

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