Which two oxides are emitted into the air when power plants produce electricity?

a. sulfur oxide and nitrogen oxide

b. sulfur oxide and nitrogen dioxide

c. sulfur dioxide and nitrogen dioxide

d. sulfur dioxide and nitrogen oxide

sulfur oxide and nitrogen oxide

Explanation:

these are released from power plants along with carbon dioxide

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.