Question 2:

 Plants, animals, and micro-organisms form the _______ components of an ecosystem.

Question 3:

 The upper portion of the atmosphere protects the organisms of the biosphere from the ________ emitted by Sun.

Question 4:

 The Sunderbans has got its name from ________trees.

Question 5:

 ________ and _________ are examples of extinction of species due to their inabilty to adapt to the pressures of the changing environment

Question 6:

 Every living organism, no matter how big or small has a crucial role to play in maintaining ______ on our planet Earth.

Question 7:

 An ecosystem consists of _________ and ___________ factors.

Question 8:

 _______ is necessary for our existence, as it forms the life support system of our planet and its inhabitants

Question 9:

________ provide us benefits that directly or indirectly support our survival and quality of life. They help to maintain balance in nature.

Question 10:

 Animals that feed directly on plants are called __________