Highly productive and shallow lakes are

A coral reef with central shallow lake is called ………….. .

Complete the missing links: A coral reef with a central shallow lake is called …………….. .

Correct the statement: Highly productivity zone in aquatic ecosystem is profundal zone.

Large sized rooted plants found in shallow waters are called

all of the following are highly productive ecosystems except

Hydrocarbon (CH_3)_3CH undergoes reaction with Br_2 and CI_2 in the presence of sunlight, if the reaction with Cl is highly reactive and that with Br is highly selective so no.of possible products respectively is (are)