Question 2:

Variation in  __________ enables different species to adapt to challenges such as environmental conditions, shrinking habitats, new diseases, and helps them to survive in future.

Question 3:

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

Question 4:

 Earth has experienced ____ major extinctions, and we are currently experiencing the ____ one.

Question 5:

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

Question 6:

 Living things are interlinked with each other for their nutritional requirements. Based on this, they are grouped as ____________.

Question 7:

 An ecosystem consists of _________ and ___________ factors.

Question 8:

____________ is always larger than a __________. The former contains many of the latter.

Question 9:

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

Question 10:

 _________ acts as the life support system of our planet, and is the strong link between our well-being and our sustainable future.