If there were no green plants, all life on the earth would come to an end! Comment? (AS5)

Green plants are autotrophs viz. they synthesize their own food (sugars) using the basic molecules (carbon dioxide and water). All living organisms are directly or indirectly dependent on plants for their food, which provides them with energy and nutrition required to carry out different life- processes. In the simplest example of food chain of plants--- deer---- lion, deer is dependent on plants for its existence while lion is dependent on deer for its existence. Therefore, if there are no green plants on which deer can dwell, the deer population will eventually decrease to zero threatening the existence of lion too. Therefore, it is rightly said that if there are no green plants, all the life would come to an end.