MEDIUM
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Select the correct statement from the following.
(A) In many invertebrates, the excretory structures are in complex tubular forms.

(B) Vertebrates have simple tubular organ as excretory structure like kidney.

(C) Protonephridia is primarily concerned with excretion.

(D) Protonephridia are excretory structures in rotifers, some annelids and cephalochordates (amphioxus).

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Important Questions on Excretory Products and Their Elimination

EASY
Biology>Human Physiology>Excretory Products and Their Elimination>Excretion in Animals
Nitrogenous waste is excreted in the form of pellet or paste by:
EASY
Biology>Human Physiology>Excretory Products and Their Elimination>Excretion in Animals
What are Euryhaline organisms?
MEDIUM
Biology>Human Physiology>Excretory Products and Their Elimination>Excretion in Animals

Match List I and List II

  List I   List II
A Taenia I Nephridia
B Paramoecium II Contractile vacuole
C Periplaneta III Flame cells
D Pheretima IV Uricose gland

Choose the correct answer from the options given below: 

MEDIUM
Biology>Human Physiology>Excretory Products and Their Elimination>Excretion in Animals
Discuss the statement: The nature of nitrogenous waste and its excretion depends on the availability of water. Explain it using any two examples.
EASY
Biology>Human Physiology>Excretory Products and Their Elimination>Excretion in Animals
The body cells in cockroach discharge their nitrogenous waste in the haemolymph mainly in the form of :
EASY
Biology>Human Physiology>Excretory Products and Their Elimination>Excretion in Animals
The major excretory product of birds is:
HARD
Biology>Human Physiology>Excretory Products and Their Elimination>Excretion in Animals
Which of the animal groups show uricotelism?
EASY
Biology>Human Physiology>Excretory Products and Their Elimination>Excretion in Animals
The major nitrogenous excretory product in mammals is:
HARD
Biology>Human Physiology>Excretory Products and Their Elimination>Excretion in Animals
Which of the following can be termed as osmoconformers?
EASY
Biology>Human Physiology>Excretory Products and Their Elimination>Excretion in Animals

Freshwater bony fishes maintain water balance by:

EASY
Biology>Human Physiology>Excretory Products and Their Elimination>Excretion in Animals
Excretion in Amoeba occurs through:
MEDIUM
Biology>Human Physiology>Excretory Products and Their Elimination>Excretion in Animals
Body fluids of shark and coelacanths can be termed as:
EASY
Biology>Human Physiology>Excretory Products and Their Elimination>Excretion in Animals
What is meant by the term osmoregulation?
EASY
Biology>Human Physiology>Excretory Products and Their Elimination>Excretion in Animals
What is meant by osmoregulation?
EASY
Biology>Human Physiology>Excretory Products and Their Elimination>Excretion in Animals
In man, the urea is mainly produced in
EASY
Biology>Human Physiology>Excretory Products and Their Elimination>Excretion in Animals
Contractile vacuole is absent in marine and parasitic protozoa because:
EASY
Biology>Human Physiology>Excretory Products and Their Elimination>Excretion in Animals
Which one of the following is likely to accumulate in a dangerous proportion in the blood of a person whose kidney is not working properly
EASY
Biology>Human Physiology>Excretory Products and Their Elimination>Excretion in Animals
Uricotelism is a method of conserving
EASY
Biology>Human Physiology>Excretory Products and Their Elimination>Excretion in Animals
NH3 in Amoeba is excreted through:
HARD
Biology>Human Physiology>Excretory Products and Their Elimination>Excretion in Animals
Terrestrial animals are generally either ureotelic or uricotelic, not ammonotelic, why?