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Internal opening is absent in protonephridia.
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Important Questions on Excretory Products and Their Elimination
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In Hydra, waste material of food digestion and the nitrogenous waste material is removed from
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Loss of water from body occurs by all of the following except
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Excretory system of Ascaris lumbricoides is made up of
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The enteronephric nephridia of earthworm are concerned with
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Consider the following statements and state which of them are incorrect?
I) Flame cells are excretory structures in flatworms.
II) Green glands are excretory organs in annelids.
III) Columns of Bertini are the conical projections of the renal pelvis into the renal medulla between the renal pyramids.
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The nephrostomes, in the kidneys, are functional in
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Bowman's glands are located in the
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Fill in the blank with the correct option provided in the bracket.
The kidney of a mammal resembles the _____ (plasma membrane/contractile vacuole/nephridia) of Amoeba in expelling out excess water.
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Read the following (A – D) four statements:
(A) Some amount of urea may be retained in the kidney matrix of mammals to maintain a desired osmolarity.
(B) Protonephridia are excretory structures in rotifers
(C) In prawns, malpighian tubules help in the removal of nitrogenous wastes and osmoregulation.
(D) In human beings, kidneys are situated between the levels of last thoracic and third lumber vertebra close to the ventral inner wall of the abdominal cavity
How many of the above statements are correct?
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Green glands are excretory in function which are found in
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Solenocytes are the main excretory structures in
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Solenocytes are used for
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One of the following does the same work as is done by nephridia in earthworm
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The nephridia of earthworm are concerned with:
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Excretory organs of cockroach are
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Match the excretory organs listed under column I with the animals given under column II. Select the answer which gives the correct combination of alphabets of the two columns.
| Column I (Animals) |
Column II (Excretory organs) |
||
|---|---|---|---|
| A. | Nephridia | p. | Hydra |
| B. | Malpighian tubules | q. | Leech |
| C. | Protonephridia | r. | Shark |
| D. | Kidneys | s. | Roundworms |
| t. | Cockroach |
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_____ are excretory organs in spiders and scorpions.
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_____ is an advanced type of excretory structure that occurs in Annelida.
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In ornithine cycle, which of following wastes are removed from the blood
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When a fresh water protozoan possessing a contractile vacuole, is placed in a glass containing marine water, the vacuole will
