Home
Class 11
BIOLOGY
Assertion: Sharks are said to be ammonot...

Assertion: Sharks are said to be ammonotelic animals.
Reason: Sharks can retain considerable amounts of ammonia in their blood.

A

If both assertion and reason are true and reason is the correct explanation of assertion

B

if both assertion and reason are true but reason is not the correct explanation of assertion.

C

if assertion is true but reason is false

D

if both assertion and reason are false.

Text Solution

AI Generated Solution

The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding the Assertion**: The assertion states that "Sharks are said to be ammonotelic animals." Ammonotelic animals excrete ammonia as their primary nitrogenous waste. 2. **Evaluating the Assertion**: Sharks are aquatic animals, but they do not excrete ammonia. Instead, they primarily excrete urea, which classifies them as ureotelic animals. Therefore, the assertion is **false**. 3. **Understanding the Reason**: The reason provided states that "Sharks can retain considerable amounts of ammonia in their blood." 4. **Evaluating the Reason**: While sharks do have some ammonia in their blood, they cannot afford to retain large amounts of it because excreting ammonia requires a significant amount of water. Sharks need to conserve water to maintain their osmotic balance, so they do not retain considerable amounts of ammonia. Thus, the reason is also **false**. 5. **Conclusion**: Since both the assertion and the reason are false, the correct answer is that both statements are false. **Final Answer**: Both assertion and reason are false. ---
**Step-by-Step Solution:** 1. **Understanding the Assertion**: The assertion states that "Sharks are said to be ammonotelic animals." Ammonotelic animals excrete ammonia as their primary nitrogenous waste. 2. **Evaluating the Assertion**: Sharks are aquatic animals, but they do not excrete ammonia. Instead, they primarily excrete urea, which classifies them as ureotelic animals. Therefore, the assertion is **false**. 3. **Understanding the Reason**: The reason provided states that "Sharks can retain considerable amounts of ammonia in their blood." ...
Promotional Banner

Topper's Solved these Questions

  • EXCRETORY PRODUCTS AND THEIR ELIMINATION

    NCERT FINGERTIPS ENGLISH|Exercise Excretory Products And Their Elimination|133 Videos

  • EXCRETORY PRODUCTS AND THEIR ELIMINATION

    NCERT FINGERTIPS ENGLISH|Exercise Excretory Products And Their Elimination|133 Videos

  • DIGESTION AND ABSORPTION

    NCERT FINGERTIPS ENGLISH|Exercise Digestion And Absorption|137 Videos

  • LOCOMOTION AND MOVEMENT

    NCERT FINGERTIPS ENGLISH|Exercise Locomotion And Movement|139 Videos

Similar Questions

Explore conceptually related problems

Animals which excrete large amount of ammonia are

Assertion :- Mostly aquatic animals are ammonotelic. Reason :- Ammonia is the most toxic form and requires large amount of water for its elimination.

Assertion : Liger in a hybrid animal. Reason : Liger is fertile.

Assertion : The cardiac impulse is said to be myogenic. Reasoning : The rate of formation and conduction of cardiac impulse can be changed by the action of nerves.

Aquatic animals are mostly ammonotelic because (a) Excretion of ammonia requires large amount of water which is available to these animals (b) Ammonia helps in checking the inflow of water into body (c) They get lesser light (d) Water contains less nitrogen

Assertion : Saturated fatty acids are non -essential fatty acids reason : they can be synthesized in animal body .

Assertion: Renal threshold of glucose is said to be 180 mg/100 mL Reason: Glucose starts appearing in the urine when its blood level exceeds 180 mg/100 mL of blood

Assertion: Plant growth as a whole is indefinite. Reason : Plants retain the capacity of continuous growth throughout their life.

Assertion: Cartilage and bone are rigid connective tissues. Reason: Blood is a connective tissue.

Assertion : Mycoplasmas are pathogenic in animals and plants. Reason : Mycoplasmas lack cell wall and can survive without oxygen. 1.If both assertion and reason and true and reason is the correct explanation of assertion. 2.If both assertion and reason and true and reason is not the correct explanation of assertion. 3.If assertion is true but reason is false. 4.If both assertion and reason are false.

Knowledge Check

  • Assertion: Renal threshold of glucose is said to be 180 mg/100 mL Reason: Glucose starts appearing in the urine when its blood level exceeds 180 mg/100 mL of blood

    A
    If both assertion and reason are true and reason is the correct explanation of assertion
    B
    if both assertion and reason are true but reason is not the correct explanation of assertion.
    C
    if assertion is true but reason is false
    D
    if both assertion and reason are false.

  • Assertion : Mycoplasmas are pathogenic in animals and plants. Reason : Mycoplasmas lack cell wall and can survive without oxygen. 1.If both assertion and reason and true and reason is the correct explanation of assertion. 2.If both assertion and reason and true and reason is not the correct explanation of assertion. 3.If assertion is true but reason is false. 4.If both assertion and reason are false.

    A
    If both assertion and reason and true and reason is the correct explanation of assertion.
    B
    If both assertion and reason and true and reason is not the correct explanation of assertion.
    C
    If assertion is true but reason is false.
    D
    If both assertion and reason are false.