though he may drive carefully, there is still a danger accident in a fog so dense -> However

47. a student is frightened by a loud noise, which results in a hormone being released into the blood. the hormone causes the student's heart to beat rapidly. the two systems that work together to cause this reaction are the endo- crine system that secretes the hormone and the (1) nervous system (3) excretory system (2) reproductive system (4) digestive system

David works in the police force. he is mainly in charge of crime prevention, detection, and maintaining order. he works at the rank of a .

Scientific inquiry refers to the diverse ways in which scientists study the natural world and propose explanations based on the evidence they gather. select the best answer from the choices provided t f