Home
Class 12
BIOLOGY
Select the correct statement from the fo...

Select the correct statement from the following.

A

Notochord is found in all chordates.

B

Pharynx is perforated by gill slits in non- chordates.

C

Hearts is dorsal in birds.

D

Both (A) and (C) are correct.

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question, we need to evaluate each of the provided statements regarding chordates and non-chordates. Let's go through the options step by step. ### Step-by-Step Solution: 1. **Evaluate Option A: "Notochord is found in all chordates."** - The notochord is a flexible rod-like structure that is a defining characteristic of chordates. It is present in all chordates at some stage of their development, even if it is replaced by the vertebral column in vertebrates. - **Conclusion:** This statement is **correct**. 2. **Evaluate Option B: "Pharynx is perforated by gill slits in non-chordates."** - Gill slits are structures found in some chordates, particularly during their embryonic development. In non-chordates, the pharynx does not have gill slits. Instead, gill slits are primarily associated with aquatic chordates. - **Conclusion:** This statement is **incorrect**. 3. **Evaluate Option C: "Heart is dorsal in birds."** - In birds, the heart is located ventrally (on the underside) and is a four-chambered organ. The statement that the heart is dorsal is incorrect. - **Conclusion:** This statement is **incorrect**. 4. **Evaluate Option D: "Both A and C are correct."** - Since Option A is correct but Options B and C are incorrect, this statement is also **incorrect**. ### Final Answer: The correct statement from the options provided is: **"Notochord is found in all chordates."**
Doubtnut Promotions Banner Mobile Dark
|

Similar Questions

Explore conceptually related problems

An inorganic iodide (A) on heating with a solution of KOH gives a gas (B) and a solution of a compound. The gas (B) on ignition in air gives a compound (C ) and water. Copper sulphate is finally reduced to the metal on passing (B) through its solution. Select the correct statement from the following for the gas (B).

Select the correct statements from the following I. Endosperm is generally triploid in angiosperms, II. All angiosperms have monosporic and endosporic embryo sac, III. Angiosperms are characterised by double fertilization, IV. All angisoperms show indirect pollination and siphonogamy

Knowledge Check

  • Select the incorrect statement from the following :

    A
    `H^(+)` can exist as `H_(9)O_(4)^(+)` in water.
    B
    `H_(2)` is thermally stable.
    C
    Ionisation of `CH_(3)COOH` is slower than that of `CH_(3)COOD`.
    D
    Kinetic isotopic effect is observed when there is retardation in the rate if `H_(2)O` is replaced by `D_(2)O`.

    • Similar Questions

    Explore conceptually related problems

    Select the correct statement form the following

    For the circuit shown in figure, select the correct statements from the following options : .

    For the circuit shown in figure, select the correct statements from the following options : .

    Two identical objects A and B are at temperatures T_A and T_B . Respectively. Both objects are placed in a room with perfectly absorbing walls maintained at a temperature T(T_AgtTgtT_B) . The objects A and B attain the temperature T eventually. Select the correct statements from the following:

    Two identical objects A and B are at temperatures T_A and T_B . Respectively. Both objects are placed in a room with perfectly absorbing walls maintained at a temperature T(T_AgtTgtT_B) . The objects A and B attain the temperature T eventually. Select the correct statements from the following:

    Select the incorrect statement from the following

    Select the incorrect statement from the following.

    Home
    Profile