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Q.

Read the following statements about earthworm and pick-out the correct statements.

a) Septal nephridia open into intestine.

b) Pharyngeal nephridia are present in the 4th, 5th and 6th segments.

c) Integumentary nephridia are present in 1st,  2nd and 3rd segments.

d) Nephridia regulate the volume and composition of the body fluids.

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a

a and b only

b

a, b and d only 

c

a, b, c and d

answer is C.

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Detailed Solution

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Integumentary nephridia are present in 3rd segment to last segment.

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Read the following statements about earthworm and pick-out the correct statements.a) Septal nephridia open into intestine.b) Pharyngeal nephridia are present in the 4th, 5th and 6th segments.c) Integumentary nephridia are present in 1st,  2nd and 3rd segments.d) Nephridia regulate the volume and composition of the body fluids.