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Structural Organisation in Animals

Difference be...

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Difference between protonephridia and nephridia? And how these both structures are present in annelida?

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Q. Assertion : Lumbricus and Nereis both belong to Annelida.

Reason : They have nephridia.

Q. Arrange the following on the basis of evolution of excretory structure.
Nephridia, Protonephridia, Kidneys, Malphigian tubules, Green glands.

Q. Protonephridia are present in platyhelminthes and metanephridia in

Q. Different types of excretory structures and animals are given below. Match them appropriately and mark the correct answer:

\begin{matrix} Excretory Structure / Organ & Animals A & Protonephridia & 1 & Prawn B & Nephridia & 2 & Cockroach C & Malpighian tubules & 3 & Earthworm D & Green gland & 4 & Flatworms \end{matrix}

Which of the following statements is correct about excretion in earthworm?
(i) Earthworm is mainly ureotelic
(ii) Septal nephridia, present on both sides of intersegmental septa of segment 15 to the last, open into intestine,
(iii) Integumentary nephridia, attached to lining of body wall of segment 3 to the last, open on the body surface.
(iv) Different types of nephridia are basically similar in structure.
(v) Nephridia regulate the volume and composition of body fluids

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Structural Organisation in Animals

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