A scientist notices an increase in the glucose production in the plants he is studying. What are the possible reasons? Check all that apply. The plant was exposed to more intense light. The plant was exposed to less intense light. The plant absorbed more carbon dioxide. The plant absorbed less carbon dioxide. The plant absorbed more oxygen. The plant absorbed less oxygen.

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.

friedrich meischer discovered it in white blood cell