Multiple Choice Questions

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The sites of the first, second and third moulting of the Ascaris larva are respectively

  • soil, lung and intestine

  • liver, stomach and intestine

  • soil, alveoli and alveoli

  • soil, intestine and lung


C.

soil, alveoli and alveoli

The development of Ascaris larva takes place outside the body of host in soil and its cleavage starts in shelled eggs. Moulting takes place in soil in shelled egg whereas second and third moulting take place in alveoli of lung. The final moulting takes place in intestine.


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Algae are useful because they

  • are large in number

  • are used in alcoholic fermentation

  • purify the atmosphere

  • are used in curdling of milk.


The plant body of moss (Funaria) is

  • completely sporophyte

  • predominantly sporophyte with gametophyte

  • completely gametophyte

  • predominantly gametophyte with sporophyte


If turgor pressure becomes equal to the wall pressure, then

  • water leaves the cell

  • water enters the cell

  • no exchange of water takes place

  • solute goes from the cell into water


Passage cells are found in

  • dicot stem

  • monocot root

  • monocot stem

  • all of these


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Non-cellular layer that connects inner surface of the epithelial tissue to the connective tissue is

  • basement membrane

  • epidermis

  • dermis

  • either (b) or (c).


Which of the following structures helps in the respiration of lichens?

  • Soredia

  • lsidia

  • Cyphella

  • Cephalodia


In Entamoeba histolytica, the presence of chromatid bodies is characteristic of

  • precystic stage

  • mature quadrinucleate stage

  • trophozoite stage

  • mature binucleate stage


Which of the following Phyla are included in Enterozoa?

  • Annelida, Mollusca, Porifera

  • Echinodermata, Hemichordata, Porifera

  • Mollusca, Arthropoda, Hemichordata

  • Porifera, Mollusca, Arthropoda


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Hydra receives impulses and stimuli through

  • nerve net

  • nematocytes

  • sensory cells

  • flame cells