Classification of Animals MCQs Part II

1) The animal nature of sponges is shown by the
a) Holozoic nutrition
b) Absence of cellulose
c) Presence of cellulose
d) All of the above

2) Sponges form a sideline of evolution, hence they are called
a) Mesozoa
b) Porifera
c) Parazoa
d) Eumetazoa

3) Sponges are
a) Pelagic
b) Free-swimming
c) Planktonic
d) Sessile

4) Choanocytes are present in a sponge in the
a) Outer layer
b) Inner layer
c) Both of these
d) None of these

5) Which of the following is a false statement?
a) All sponges are hermaphrodites
b) Choanocytes are reproductive in function
c) Sponges are multicellular organisms
d) Porocytes allow incurrents of water

6) The endoskeleton of sponges is made up of
a) Cartilage
b) Bone
c) Calcareous spicules
d) Calcareous or siliceous spicules, or siliceous spiculs and spongin fibres, or only spongin fibres

7) A valuable marriage gift in Japan is
a) Spongilla
b) Hyalonema
c) Leucosolenia
d) Euplectella

8) “Venus Flower Basket” belongs to the phylum
a) Porifera
b) Coelenterate
c) Mollusca
d) Echinodermata

9) Euplectella is a
a) Limy sponge
b) Glass sponge
c) Boring sponge
d) Fresh water sponge

10) Glass sponges live in
a) Fresh water
b) Shallow water
c) Brackish water
d) Deep sea

11) “Till death do us part” is symbolized by
a) Spongilla
b) Euplectella
c) Sycon
d) Hyalonema

12) Which of the following is detrimental to the pearl industry?
a) Euspongia
b) Oyster
c) Cliona
d) Chalina

13) Porocytes are special cells for the passage of
a) Excretory products within body of flatworms
b) Sweat upon surface of mammalian epidermis
c) Incoming water current in the body of sponges
d) Outgoing water current on the top of sponges

14) Which of the following pairs is not correctly matched?
a) Amoebocytes-Transport food to non feeding cells
b) Collar cells-Movement of water and filtering food
c) Osculum-control of water entry
d) Spicules-Skeletal supporting element

15) “Nurse cells” in sponges are
a) Thesocytes
b) Trophocytes
c) Myocytes
d) Scleroblasts

16) Exogenous budding of asexual reproduction in sponges is known as
a) Regeneration
b) Amphimixis
c) Gemmulation
d) Gemmation

17) Larval stage is active, but the adult is fixed in
a) Hydra
b) Snails
c) Honey-bees
d) Sponges

18) Parenchymula is the larva of
a) Clathrina
b) Ascaris
c) Hydra
d) Pheretima

19) Mark the correct statement:
a) The body of sponges consists of epithelial tissue only
b) All the four types of tissues are seen in the body of the sponges
c) Only epithelial and connective tissues are present
d) Structurally organised tissues are absent in the body of sponges

20) The pathway of entering and coming out of water in sponges is the
a) Water vascular system
b) Canal system
c) Feeding system
d) Circulatory current

21) Sponges are not found in
a) Sea water
b) Brackish water
c) Cold water
d) Sandy shore

22) Which one of the following is a fresh water sponge?
a) Sycon
b) Spongilla
c) Euspongia
d) Euplectella

23) In sponges, the food is stored in
a) Trophocytes
b) Desmocytes
c) Archeocytes
d) Thesocytes

24) Power of regeneration in sponges is due to
a) Amoebocytes
b) Archaeocytes
c) Scleroblasts
d) Thesocytes

25) The most primitive group of multicellular animals is
a) Sponges
b) Nemertine
c) Coelenterate
d) Colonial prozoans

26) Hydra is a
a) Marine Polyp
b) Freshwater Polyp
c) Colonial Polyp
d) None of the above

27) Hydra is
a) Asymmetrical
b) Radially symmetrical
c) Bilaterally symmetrical
d) None

28) The chemical substance that stimulates and causes food taking reaction in Hydra is
a) Methionine
b) Glycine
c) Hypnotoxin
d) Glutathione

29) Which tissue is absent in Hydra?
a) Nervous tissue
b) Muscular tissue
c) Epithelial tissue
d) Connective tissue

30) Hydra is
a) Monoecious
b) Dioecious
c) Acious
d) None

31) The cavity of Hydra is a
a) Haemocoel
b) Hydrocoel
c) Pseudocoelom
d) Gastro-vascular cavity

32) A hydra normally possesses
a) A single testis and a single ovary
b) A single ovary and many testes
c) One testis and many ovaries
d) Many testes and many ovaries

33) In Hydra, the coelenteron serves for
a) Locomotion and excretion
b) Excretion and circulation
c) Digestion and circulation
d) Digestion and storage

34) The structure of Hydra which serves as pseudopodia in Amoeba is
a) Tentacles
b) Basal disc
c) Hypostome
d) Nematocyst

35) If the nematocysts of Hydra are removed which of the following activities is hindered most?
a) Locomotion
b) Excretion
c) Food capture
d) Digestion

36) The chief function of nematocysts in Hydra is
a) To paralyze its prey
b) To test the quality of water
c) To capture its prey
d) To test the quality of food

37) The small green plant that lives inside the body of Hydra as a symbiont is
a) Volvox
b) Chlamydomonas
c) Euglena
d) Zoochorellae

38) The structure through which the mouth of Hydra opens is the
a) Tentacle
b) Oral hood
c) Hypostome
d) Basal disc

39) Hydra respires through
a) Mesogloea
b) General body surface
c) Pellicle
d) Gastrodermis

40) Which of the following is not found in Hydra?
a) Regeneration
b) Fertilization
c) Gastrovasculation
d) Segmentation

41) Tentaculocysts in Obelia are meant for
a) Locomotion
b) Balancing
c) Swimming
d) Reproduction

42) A coral island with a central shallow lake is known as a/an
a) Coral reef
b) Lagoon
c) Atoll
d) Corallite

43) The body wall of Hydra is made up of
a) Ectoderm and endoderm
b) Ectoderm, mesoderm, endoderm
c) Ectoderm, mesogloea, endoderm
d) Mesoderm and endoderm

44) A Hydra can suddenly contract its body by the contraction of
a) Musculo-glandular cells
b) Musculo-nutritive cells
c) Musculo-epithelial cells
d) Interstitiol cells

45) In Hydra, the absence of circulatory system is fulfilled by
a) Ectoderm
b) Endoderm
c) Mesoglea
d) Coelenteron

46) Digestion in Hydra is
a) Intra-cellular
b) Extra-cellular
c) First extra-cellular, and then intra cellular
d) First intra-cellular, and then extra cellular

47) Hydra has no special structure for
a) Attachment
b) Respiration
c) Food capturing
d) Offence

48) The undigested food in Hydra is expelled from the
a) Mouth
b) Hypostome
c) General surface
d) Anus

49) The non-cellular layer in Hydra is
a) Ectodermis
b) Hypodermis
c) Mesodermis
d) Mesogloea

50) In Hydra, the nematocysts are abundant on the
a) Upper part
b) Hypostome
c) Middle part
d) Tentacles

51) The germ cells in Hydra develop from the
a) Musculo-epithelial cells
b) Musculo-nutritive cells
c) Interstitial cells
d) Glandular cells

52) Coral reef formation is related with
a) Porifers
b) Coelenterates
c) Molluscs
d) Aschelminthes

53) One of the following mainly forms coral reef:
a) Hydrozoans
b) Schyphozoans
c) Anthozoans
d) None

54) Hydranth is the
a) Polyp of Obelia
b) Medusa of Obelia
c) Blastostyle of Obelia
d) None of the above

55) Hydra is
a) Omnivorous
b) Carnivorous
c) Herbivorous
d) None

56) In Hydra nutrition is
a) Holozoic
b) Holophytic
c) Saprozoic
d) All

57) Algae in Hydra remains a symbiotic in
a) Hydra obligactis
b) Hydra furca
c) Hydra vulgaris
d) Hydra viridis

58) Association of green algae & Hydra is
a) Parasitism
b) Mutualism
c) Commensalism
d) Cohabitalism

59) Hydra is
a) marine, solitary and diploblastic
b) fresh water, solitory and triploblastic
c) fresh water, solitary and radially symmetrical
d) marine, colonial and bilateral symmetrical

60) Hydra can digest all except
a) Protein
b) Fats
c) Starch
d) All

61) Pseudopodium & flagella are both present in the
a) Gland cells of Hydra
b) Sensory cells of Hydra
c) Musculo epithelial cells of Hydra
d) Musculo nutritive cells of Hydra

62) Phylum coelenterata remains
a) Cellular grade
b) Tissue grade
c) Organ grade
d) Acellular grade

63) Coelenteron and cnidoblast cells are found in
a) Porifera
b) Coelenterata
c) Annelida
d) Aschelminthes

64) Polymorphism is an important feature in
a) Scyphozoa
b) Hydrozoa
c) Aleyonaria
d) Zoantharia

65) Which of the following is commonly known as the mushroom coral?
a) Fungia
b) Coralium
c) Astraea
d) Meandra

66) Polymorphism is exhibited best by
a) Hydra
b) Physalia
c) Jellyfish
d) Sea anemone

67) In hydra testes are formed from
a) Nematocysts
b) Interstitial cells
c) Eithelio-muscular cells
d) All above

68) Which pair of cells is present in the epidermis of hydra but not in its endoderm/
a) Stinging cells and interstitial cells
b) Gland cells and germ cells
c) Stinging cells and germ cells
d) Stinging cells and gland cells

69) If a hydra is cut into three pieces, the middle one will grow and form
a) both sides
b) oral side
c) pedal disc side
d) none above but only tentacles

70) An ornamental coral is
a) Gorgonia
b) Fungia
c) Corallium rubrum
d) Fungia

71) Hydra recognizes its prey by the
a) mechanical stimulus of dead prey
b) some special nematocysts
c) tentacles
d) chemical stimulus secreted by injured cells of the prey

72) The most sensitive part of a nematocyst is the
a) Lasso
b) Cnidocil
c) Trichocyst
d) Nematocyst whole

73) One of the following cells are absent in the gastrodermis:
a) neurons
b) nutritive muscle cells
c) nematocysts
d) gland cells

74) Corals are
a) sedentary sponges
b) sedentary cnidarians
c) sedentary ascidians
d) free living ctenophorans

75) The steroeogastrula of hydra is so called because of its
a) Solid nature
b) Two layers
c) Encapsulation
d) Hollow nature

76) A characteristic of coelenterates only is the occurrence of
a) Polymorphism
b) Hermaphoroditism
c) Nematocysts
d) Flame cells

77) Jelly fishes belong to the class
a) Scyphozoa
b) Hydrozoa
c) Anthozoa
d) None of these

78) Cnidaria are characterized by
a) Nematoblasts(cnidoblasts)
b) Coelenteron
c) Tissue level of organization
d) All of these

79) Nematocysts are absent in hydra in the region of the
a) tentacles
b) hypostome
c) stem of body
d) basal disc

80) The animal which has mesenteries in the gastro-vascular cavity is
a) Aurelia
b) Hydra
c) Physalia
d) Metridium

81) A coral reef running parallel to the shore with no navigable channel in between is called a
a) barrier reef
b) fringing reef
c) atoll
d) striking reef

82) Which of these is not a coelenterate?
a) Silverfish
b) Jellyfish
c) Sea anemone
d) Physalia

83) Which one of the following is a diagnostic feature of Coelenterata?
a) Marine habitat
b) Tentacles around the mouth
c) Gastrovascular cavity
d) None of these

84) Metagenesis is found in some
a) Sponges
b) Coelenterates
c) Arthropods
d) Chordates

85) Mesogloea is present in the phylum
a) Hydrozoa
b) Porifera
c) Annelida
d) Coelenterata

86) “Portuguese man-of-war” is a
a) Coral
b) Sea anemone
c) Polymorphic coelenterate
d) Sedentary colenterate

87) “Portuguese man-of-war” is
a) Obelia
b) Pennatula
c) Coral
d) Physalia

88) The function of a dactylozoid in a polymorphic colony is
a) Offence and food capture
b) Nutrition
c) Excretion
d) Reproduction

89) Medusa, the reproductive stage, is found in
a) Hydra
b) Sea anemone
c) Starfish
d) Obelia

90) The larva of Obelia is the
a) Parenchymula
b) Hydrula
c) Planula
d) Ephyra

91) Which of these is bioluminescent?
a) Cuttlefish
b) Physalia
c) Jellyfish
d) All of these

92) Scyphozoan medusa are more commonly known as
a) Sea anemones
b) Corals
c) Hydra
d) Jellyfishes

93) The generic name of the common jellyfish is
a) Aurelia
b) Physalia
c) Pennatula
d) Gorgonia

94) The valuable red coral used in jewellery is
a) Corallium
b) Meandrina
c) Astraea
d) Favia

95) Which of the following is the reproductive zooid in Physalia?
a) Pneumatophore
b) Dactylozooid
c) Gonozooid
d) Gastrozooid

96) Corals belong to the phylum
a) Porifera
b) Cnidaria
c) Annelida
d) Mollusca

97) Medusoid stage is completely absent in
a) Metridium
b) Aurelia
c) Obelia
d) Rhizostoma

98) A coral island with a central shallow lake is known as a/an
a) Lagoon
b) Atoll
c) Coral reef
d) All of these

99) An association mutually beneficial to both partners is represented by
a) Hydra and waterfleas
b) Zoochlorellae and Hydra
c) Earthworm and farmer
d) Honeybee and man

100) The needle-like process of a cnidoblast is called a
a) Trichocyst
b) Cnidocil
c) Lasso
d) Nematocyst


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