You are managing large feedlot of cattle. A pharmaceutical company wants you to try a new antibiotic to treat shipping fever in newly arrived cattle. You are currently not using this antibiotic. You will use the same feed, water and conditions of the cattle. You will measure the temperature of the cattle's fevers to see whether or not the new antibiotic works on treating shipping. What is the control group and the experimental group?

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.

haha

it's made from mineral oil