NEED THIS ANSWERED AS SOON AS POSSIBLE!! What would happen if the photosynthesis and cell respiration didn't perform their roles in the carbon cycle? What would be a possible solution to the problem(s) that would arise?

While photosynthesis requires carbon dioxide and releases oxygen, cellular respiration requires oxygen and releases carbon dioxide. ... Without oxygen, much less ATP would be produced. Cellular respiration and photosynthesis are important parts of the carbon cycle.Without photosynthesis, there would be no sugar, without which there could be no cellular respiration. ... Both animal cells and plant cells depend on cellular respiration for their energy needs, because both animal cells and plant cells need ATP.

the oldest known insects are believed to live around 400 millions ago as suggested by the fossil records.   some plants having woody stems also evolved during this time.

after the evolution of insects the first four legged species or the tetrapods evolved in shallow freshwater habitats from the intermediate species approximately 397 million years ago. the tetrapods went on conquering the land giving rise to amphibians, reptiles, mammals and birds.

the major split in tetrapods first occurred 340 million years ago branching off from amphibians.

363 million years ago when the carboniferous period began the insects started roaming on land and taking flights, following which the four limbed tetrapods adapted in the terrestrial habitat.