Two students are planning an experiment that will test how planaria (aquatic flatworms) respond to different environments .

What is the difference between bacterial infections and viral infections?

Identify the missing parts of the carbon cycle

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.