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

(d) Decomposers Decomposers include micro-organisms such as bacteria and fungi. They form the largest population in a food chain and obtain nutrients by breaking down the remains of dead plants and...

(d) None of the above Plants are the only producers. Thus, they are called primary producers. There are no other producers in a food chain.

When we say simple or complex organisms we are talking in terms of evolutionary history of an organism. A simple organism is considered to be primitive and has simple thallus...

(b) Reproduction. 

(c) Diamantine Trench is istuated in south-east part of Indian Ocean. The depth of Diamantine Trench is 8047 m.

(a) 25°–35° N and S in both hemisphere is a high pressure belt and high temperature zone. This belt owes its origin to the rotation of the earth and sinking...

(d) Tides are the rise and fall of sea levels caused by the combined effects of gravitational forces exerted by the Moon, Sun, and rotation of the Earth.

(b) Bacteria and Fungi both are known as decomposer organisms. Bacteria are important decomposers; they can break down any kind of organic matters. Fungi are primary decomposers, they not only...

(c) 1, 2 and 3

(d) 1, 2, and 3