Q. 1064.5( 4 Votes )

A unicellular animal P having no fixed shape ingests a food particle by forming temporary finger-like projections Q. The food particle is engulfed with a little surrounding water to form a temporary stomach R inside it. The chemicals S from surrounding cytoplasm enter into R and break down food into small and soluble molecules by chemical reactions. The digested food is absorbed directly into cytoplasm by the process T. The undigested food is thrown out of the body by the rupture of a cell organelle U in a process called V.

(a) Name the unicellular animal P. (b) What are (i) Q and (ii) R ?

(c) Name (i) chemicalS, and (ii) process T.

(d) Name (i) organelle U, and (ii) process V.

Answer :

(a) Amoeba (P) is a unicellular animal which has no mouth for ingestion of food.

(b) (i) Amoeba (P) engulfs the food particles by forming finger-like projections called pseudopodia (Q).

(ii) The food is engulfed with little water to form a food vacuole (R).

(c) (i) Enzymes (S) breaks down food into small soluble molecules.

(ii) The digested food is absorbed directly into the cytoplasm by diffusion (T).

(d) (i) The undigested food is thrown out of the body by rupturing the cell membrane (U) (ii) Egestion (V) is the process of throwing the undigested food out of the body.

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