What are the three critical features of a nervous system? O absorbing nutrients, muscle contraction, and movement of gases
receiving input, processing information, and initiating a response
structural support, transportation, and secretion
pain receptivity, preventing suffering, and endurance
inhalation, gas exchange, and olfaction

answer; /// i believe that the correct answer is ( monophasic ); ethinyl estradiol- ethynodiol diacetate is a monophasic oral contraceptive agent; ///

the question isn't complete here so i can't right an answer '_'

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.

the answer is definitely a