Statement (S): Marine lampreys migrate to rivers for spawning.
Reason (R): Marine lampreys return to sea water after spawning.

Both S and R are correct but R is not correct explanation to S

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Both S and R are correct and R is correct explanation to S

No worries! We‘ve got your back. Try BYJU‘S free classes today!

S is wrong but R is correct

No worries! We‘ve got your back. Try BYJU‘S free classes today!

S is correct but R is wrong

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Open in App

Solution

The correct option is D S is correct but R is wrong
D. S is correct but R is wrong
Reason: Petromyzon or marine lamprey belongs to the cyclostomata. They are anadromous in nature. They migrate to fresh water for laying their eggs and eventually died there. After metamorphism when the larvae become mature, get back to the marine environment.
So the correct option is D.

Suggest Corrections

Similar questions

Assertion (A) Addition reaction of water to but-1-ene in acidic medium yields butan-1-ol.
Reason (R) Addition of water in acidic medium proceeds through the formation of primary carbocation.
(a) Assertion and reason both are correct and reason is correct explanation of assertion.
(b) Assertion and reason both are wrong statements.
(c) Assertion is correct statement but reason is wrong statement.
(d) Assertion is wrong statement but reason is correct statement.
(e) Both assertion and reason are correct statements but reason is not correct explanation of assertion.

Assertion (A) o-nitrophenol is less soluble in water than the m- and p-isomers.
Reason (R) m and p-nitrophenols exist as associated molecules.
(a) Assertion and reason both are correct and reason is correct explanation of assertion.
(b) Assertion and reason both are wrong statements.
(c) Assertion is correct statement but reason is wrong statement.
(d) Assertion is wrong statement but reason is correct statement.
(e) Both assertion and reason are correct statements but reason is not correct explanation of assertion.

Assertion (A) Boiling points of alcohols and ethers are high.
Reason (R) They can form intermolecular hydrogen-bonding.
(a) Assertion and reason both are correct and reason is correct explanation of assertion.
(b) Assertion and reason both are wrong statements.
(c) Assertion is correct statement but reason is wrong statement.
(d) Assertion is wrong statement but reason is correct statement.
(e) Both assertion and reason are correct statements but reason is not correct explanation of assertion.

Assertion (A) Bond angle in ethers is slightly less than the tetrahedral angle.
Reason (R) There is a repulsion between the two bulky (- R) groups.
(a) Assertion and reason both are correct and reason is correct explanation of assertion.
(b) Assertion and reason both are wrong statements.
(c) Assertion is correct statement but reason is wrong statement.
(d) Assertion is wrong statement but reason is correct statement.
(e) Both assertion and reason are correct statements but reason is not correct explanation of assertion.

Assertion (A) Ethanol is a weaker acid than phenol.
Reason (R) Sodium ethoxide may be prepared by the reaction of ethanol with aqueous NaOH.
(a) Assertion and reason both are correct and reason is correct explanation of assertion.
(b) Assertion and reason both are wrong statements.
(c) Assertion is correct statement but reason is wrong statement.
(d) Assertion is wrong statement but reason is correct statement.
(e) Both assertion and reason are correct statements but reason is not correct explanation of assertion.

Join BYJU'S Learning Program

Statement (S): Marine lampreys migrate to rivers for spawning.Reason (R): Marine lampreys return to sea water after spawning.

Statement (S): Marine lampreys migrate to rivers for spawning.
Reason (R): Marine lampreys return to sea water after spawning.