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A sedentary sea anemone gets attached to...

A sedentary sea anemone gets attached to the shell lining of hermit crab. The association is

A

ectoparasitism

B

symbiosis

C

commensalism

D

amensalism

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The shells of crabs found around a particular coastal location in Japan seem mostly to resemble the legendary face of a Samurai. Given below are two explanations of this observed fact. Which of these strikes you as a scientific explanation ? (a) A tragic sea accident several centuries ago drowned a young Samurai. As a tribute to his bravery, nature through its inscrutable ways immortalised his face by imprinting it on the crab shells in that area. (b) After the sea tragedy, fishermen in that area, in a gesture of honour to their dead hero, let free any crab shell caught by them which accidentally had a shape resembling the face of a Samurai. Consequently, the particular shape of the crab shell survived longer and therefore in course of time the shape was genetically propagated. This is an example of evolution by artificial selection.

The association of Sea Anemone and Hermit crab is an example of:

{:(1."Egrets and cattle",a."Parasitism"),(2."Sea anemone and hermit crab",b."Predation"),(3."Jackal and deer",c."Commensalism"),(4."Pathogenic fungi",d.Mutualism"):}

{:(1."Egrets and cattle",a."Parasitism"),(2."Sea anemone and hermit crap",b."Predation"),(3."Jackal and deer",c."Commensalism"),(4."Pathogenic fungi",d."Mutualism):}

Match the following with correct combination . {:("column I","Column II"),("a Mutualism","i Tiger and deer"),("b Commensalism","ii Cuscuta on cissus"),("c Parasitism","iii Sucker fish and shark"),("d Predation","iv Crab and sea anemone"):}

SARAS PUBLICATION-MODEL QUESTION PAPER 2-EXERCISE
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  2. The organisms restricted to narrow range of temperature are called

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  3. A sedentary sea anemone gets attached to the shell lining of hermit cr...

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  4. The second stage of hydrosere is occupied by plants like

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