What does R represent?

Which statement about the pancreas is not true? a. it is an endocrine organ in the abdomen. b. it release chemicals into the digestive system. c. it releases insulin to increase glucose levels. d. it release hormones into the bloodstream.

Which zone within the open-ocean zone is home to the most organisms? deep zone surface zone intertidal zone transition zone

As a result of these processes the single celled organism accomplishes