Which of these BEST explains cellular respiration? Water, oxygen, and food molecules bond together to form ATP for energy.
Water, oxygen, and food molecules bond together to form ATP for energy.

Food and carbon dioxide molecules are broken down to form sugar for energy.
Food and carbon dioxide molecules are broken down to form sugar for energy.

Food and oxygen molecules are broken down to form new compounds including ATP for energy.
Food and oxygen molecules are broken down to form new compounds including ATP for energy.

Sunlight and carbon dioxide molecules bond together to form oxygen for energy.

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.