91.

ASSERTION (A) : Coral reefs grow in shallow and warm water.

REASON (R) : Near vertical and direct incidence of solar radiation is essentially required for the growth of coral reefs.

• Both (A) and (R) are true.

• Both (A) and (R) are false.

• (A) is true , but (R) is false.

• (A) is false , but (R) is true.

Red Sea is an example of 

• Synclinal valley

• Volcanic structure

• Rift valley

• Eroded valley

The correct sequence of the following features towards sea from the coast is :

• Berm-Lowtide terrace-Longshore trough-Longshore bar

• Longshore trough-Longshore bar-Berm-Lowtide terrace

• Lowtide terrace-Berm-Longshore bar-Longshore trough

• Longshore bar-Lowtide terrace-Berm-Longshore trough

ASSERTION (A) : When sand arrives at a particular section of the beach more rapidly , than it is carried away , the beach is widened and built ocean ward.

REASON (R) : Th progradation process is everywhere common in the coastal environment.

• (A) is correct , (R) is wrong.

• (A) is wrong , but (R) is correct.

• Both (A) and (R) are correct

• Both (A) and (R) are wrong.

The ocean current Benguala is noticed in

• Pacific ocean

• Indian ocean

• Atlantic ocean

• Arctic ocean

Atoll is one of the stages of

• A natural reservoir

• A pressure system

• A coral development

• Development of the carbon sink in the ocean

The correct sequence of the great Oceans in term of area is

• Indian-Pacific-Arctic-Atlantic

• Pcific-Atlantic-Indian-Arctic

• Indian-Pacific-Atlantic-Arctic

• Arctic-Indian-Atlantic-Pacific

Bay of Bengal is a

• Large marine ecosystem

• Small marine ecosystem

• A subset of small marine ecosystem

• A subset of large coastal ecosystem