339651
Select the incorrect statement from the following about ammonia
1 It is formed in the kidneys
2 It is generally excreted by the process of diffusion.
3 It is excreted as ammonium ion through gill surface in fishes.
4 It is readily soluble in water.
Explanation:
The process of excreting ammonia is Ammonotelism. Many bony fishes, aquatic amphibians and aquatic insects are ammonotelic in nature. Ammonia, as it is readily soluble, is generally excreted by diffusion across body surfaces or through gill surfaces (in fish) as ammonium ions. Kidneys do not play any significant role in its removal.
BIOXI19: EXCRETORY PRODUCTS AND THEIR ELIMINATION
339652
Which excretory product requires maximum water for its elimination?
1 Ammonia
2 Urea
3 Uric acid
4 Creatinine
Explanation:
Ammonia is the most toxic form and requires large amount of water for its elimination.
BIOXI19: EXCRETORY PRODUCTS AND THEIR ELIMINATION
339653
The ammonia formed is converted into urea in which of the following organs
1 Kidney
2 Blood
3 Ornithine cycle
4 Liver
Explanation:
Ammonia, urea and uric acid are the major forms of nitrogenous wastes excreted by the animals. Ammonia is the most toxic form and requires large amount of water for its elimination, whereas uric acid, being the least toxic, can be removed with a minimum loss of water. Hence, order of toxicity is - Uric acid < Urea \( < \) Ammonia.
BIOXI19: EXCRETORY PRODUCTS AND THEIR ELIMINATION
339654
Assertion : Malpighian tubules are excretory organs in most of the insects. Reason : These help in excretion of urea and creatinine.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect
Explanation:
Assertion is true, but Reason is false and can be corrected as Insects are the members of phylum-Arthropoda, in which excretion takes place through Malpighian tubules. But, insects excrete uric acid (not urea) as their nitrogenous wastes in the form of pellet or paste which minimise the loss of water. Thus, insects are called uricotelics.
339651
Select the incorrect statement from the following about ammonia
1 It is formed in the kidneys
2 It is generally excreted by the process of diffusion.
3 It is excreted as ammonium ion through gill surface in fishes.
4 It is readily soluble in water.
Explanation:
The process of excreting ammonia is Ammonotelism. Many bony fishes, aquatic amphibians and aquatic insects are ammonotelic in nature. Ammonia, as it is readily soluble, is generally excreted by diffusion across body surfaces or through gill surfaces (in fish) as ammonium ions. Kidneys do not play any significant role in its removal.
BIOXI19: EXCRETORY PRODUCTS AND THEIR ELIMINATION
339652
Which excretory product requires maximum water for its elimination?
1 Ammonia
2 Urea
3 Uric acid
4 Creatinine
Explanation:
Ammonia is the most toxic form and requires large amount of water for its elimination.
BIOXI19: EXCRETORY PRODUCTS AND THEIR ELIMINATION
339653
The ammonia formed is converted into urea in which of the following organs
1 Kidney
2 Blood
3 Ornithine cycle
4 Liver
Explanation:
Ammonia, urea and uric acid are the major forms of nitrogenous wastes excreted by the animals. Ammonia is the most toxic form and requires large amount of water for its elimination, whereas uric acid, being the least toxic, can be removed with a minimum loss of water. Hence, order of toxicity is - Uric acid < Urea \( < \) Ammonia.
BIOXI19: EXCRETORY PRODUCTS AND THEIR ELIMINATION
339654
Assertion : Malpighian tubules are excretory organs in most of the insects. Reason : These help in excretion of urea and creatinine.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect
Explanation:
Assertion is true, but Reason is false and can be corrected as Insects are the members of phylum-Arthropoda, in which excretion takes place through Malpighian tubules. But, insects excrete uric acid (not urea) as their nitrogenous wastes in the form of pellet or paste which minimise the loss of water. Thus, insects are called uricotelics.
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BIOXI19: EXCRETORY PRODUCTS AND THEIR ELIMINATION
339651
Select the incorrect statement from the following about ammonia
1 It is formed in the kidneys
2 It is generally excreted by the process of diffusion.
3 It is excreted as ammonium ion through gill surface in fishes.
4 It is readily soluble in water.
Explanation:
The process of excreting ammonia is Ammonotelism. Many bony fishes, aquatic amphibians and aquatic insects are ammonotelic in nature. Ammonia, as it is readily soluble, is generally excreted by diffusion across body surfaces or through gill surfaces (in fish) as ammonium ions. Kidneys do not play any significant role in its removal.
BIOXI19: EXCRETORY PRODUCTS AND THEIR ELIMINATION
339652
Which excretory product requires maximum water for its elimination?
1 Ammonia
2 Urea
3 Uric acid
4 Creatinine
Explanation:
Ammonia is the most toxic form and requires large amount of water for its elimination.
BIOXI19: EXCRETORY PRODUCTS AND THEIR ELIMINATION
339653
The ammonia formed is converted into urea in which of the following organs
1 Kidney
2 Blood
3 Ornithine cycle
4 Liver
Explanation:
Ammonia, urea and uric acid are the major forms of nitrogenous wastes excreted by the animals. Ammonia is the most toxic form and requires large amount of water for its elimination, whereas uric acid, being the least toxic, can be removed with a minimum loss of water. Hence, order of toxicity is - Uric acid < Urea \( < \) Ammonia.
BIOXI19: EXCRETORY PRODUCTS AND THEIR ELIMINATION
339654
Assertion : Malpighian tubules are excretory organs in most of the insects. Reason : These help in excretion of urea and creatinine.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect
Explanation:
Assertion is true, but Reason is false and can be corrected as Insects are the members of phylum-Arthropoda, in which excretion takes place through Malpighian tubules. But, insects excrete uric acid (not urea) as their nitrogenous wastes in the form of pellet or paste which minimise the loss of water. Thus, insects are called uricotelics.
339651
Select the incorrect statement from the following about ammonia
1 It is formed in the kidneys
2 It is generally excreted by the process of diffusion.
3 It is excreted as ammonium ion through gill surface in fishes.
4 It is readily soluble in water.
Explanation:
The process of excreting ammonia is Ammonotelism. Many bony fishes, aquatic amphibians and aquatic insects are ammonotelic in nature. Ammonia, as it is readily soluble, is generally excreted by diffusion across body surfaces or through gill surfaces (in fish) as ammonium ions. Kidneys do not play any significant role in its removal.
BIOXI19: EXCRETORY PRODUCTS AND THEIR ELIMINATION
339652
Which excretory product requires maximum water for its elimination?
1 Ammonia
2 Urea
3 Uric acid
4 Creatinine
Explanation:
Ammonia is the most toxic form and requires large amount of water for its elimination.
BIOXI19: EXCRETORY PRODUCTS AND THEIR ELIMINATION
339653
The ammonia formed is converted into urea in which of the following organs
1 Kidney
2 Blood
3 Ornithine cycle
4 Liver
Explanation:
Ammonia, urea and uric acid are the major forms of nitrogenous wastes excreted by the animals. Ammonia is the most toxic form and requires large amount of water for its elimination, whereas uric acid, being the least toxic, can be removed with a minimum loss of water. Hence, order of toxicity is - Uric acid < Urea \( < \) Ammonia.
BIOXI19: EXCRETORY PRODUCTS AND THEIR ELIMINATION
339654
Assertion : Malpighian tubules are excretory organs in most of the insects. Reason : These help in excretion of urea and creatinine.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect
Explanation:
Assertion is true, but Reason is false and can be corrected as Insects are the members of phylum-Arthropoda, in which excretion takes place through Malpighian tubules. But, insects excrete uric acid (not urea) as their nitrogenous wastes in the form of pellet or paste which minimise the loss of water. Thus, insects are called uricotelics.