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CSS :: Phylum Cnidaria or Coelentrata


51.  Number of tentacles in Hydra is:
A. 2 ? 4 B. 4 ? 10
C. 10 ? 20 D. 40 ? 50

52.  Most favourable food for Hydra is:
A. Water-fleas B. Bacteria
C. Fishes D. Frog tadpoles

53.  Largest nematocysts of Hydra are:
A. Penetrant B. Volvent
C. Holotrichous isorhizas D. None of these

54.  Nervous system of Hydra is made up of:
A. Pelarized nerve cells B. Non-polar nerve cells
C. Ganglionated nerve cords D. Well defined nerves

55.  Pentrant, volvent and glutinants are various kinds of:
A. Mouth parts of mosquito B. Laraval stages of Ascaris
C. Nematocysts of Hydra D. None of these

56.  Which of these does not occur in Hydra:
A. Regeneration B. Segmentation
C. Fertilization D. Mating

57.  Hydra respires with the help of:
A. Tentacles B. Body surface
C. Namatocysts D. Coelenteron

58.  Which of these is found in Hydra:
A. Metabolism B. Metamerism
C. Metamorphosis D. Sexual dimorphism

59.  An association mutually beneficial to both partners is represented by:
A. Men and honey bee B. Zoochlorellae and Hydra
C. Hydra and water fleas D. Farmer and earthworm

60.  Division of labour in multicellular animals means:
A. All functions by a single cell B. A single function performed by various cells jointly
C. Different functions by different cell types D. Similar functions by different types of cells




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