Respuesta :

Explanation:

  • Belemnites are located first 350M years ago but then they were not common or in very less amount.
  • In jurasic period about 65-213M years ago they were highly located .

So

the rock should be atleast 200M years ago

boyboytroy2010

Answer:

room where biological studies, analyzes and experiments are carried out. Based on the Occupational Health and Safety Act (ArbSchG), Infection Protection Act (IfSG) and Home Work Act (HAG), the Biological Agents Ordinance (BioStoffV) applies.