The intricate siliceous cell walls of diatoms are composed of two overlapping halves. What is the specific term used to describe these halves?

Which of the following protist release toxins that may even kill fishes and other marine animal?

Chief producers in oceans are

Sea water glows during night mainly due to occurance of:

Chief producers in oceans are

Chief producers in the ocean are:

Siliceous frustules of diatoms being indestructible, piled up at the bottom of ocean and formed a thick bed over billions of years. Such a thick bed is known as

Which of the following organisms are known as chief producers in the oceans ?

Sea water glows during night mainly due to occurance of:

Chief producers in the ocean are:

Siliceous frustules of diatoms being indestructible, piled up at the bottom of ocean and formed a thick bed over billions of years. Such a thick bed is known as