Which period is called age of fishes ?

Which era is known as age of reptiles?

Which one of the following food fishes of U.P. is a carp, which is cultivated in U.P. but is not a native of India ?

Which type of tail fin is found in cartilage fishes?

How do fish move ?

Give the economy of fishes.

What is food of fish ?

Among the following edible fishes, which one is a marine fish having rich source of omega-3 fatty acids ?

Which period of the periodic table contains maximum number of elements?

Which technique is used to know the age of fossils ?

Which technique is used to know the age of fossils?