Thermoreceptors, testing hot and cold: There are two different types of thermoreceptors in the skin: End Bulbs of Krause and Ruffini End Organs. End Bulbs of Krause detect cold while Ruffini End Organs detect heat. These receptors are both phasic in nature. Fill one cup with warm water, one cup with ice water, and two cups with room temperature water. Submerge the fingers of one hand in the warm water cup and the fingers of the other hand in the ice water cup. Keep them submerged for 1 minute. Now, place the fingers of each hand in the room temperature cups. Since the receptors are phasic, what do you expect will happen if you submerge your hand in warm water for 2 minutes?

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 not right