What body system contains a structure that can expand to hold more waste products A. Urinary System B. Endocrine System C. Respiratory System

Wind energy is plentiful in regions with vast open spaces it is a non polluting renewable resource what could be an economic factor that makes the use of this resource less feasible then non renewable resource even in such regions

Which of the following best describes the relationship between glucose and complex molecules such as hormones?

With regard to enzymes, key is to lock as a) substrate is to activation energy eliminate b) product is to substrate. c) enzyme is to active site. d) substrate is to active site.