How some cells know to be muscle and some know to be bone.

The carbon cycle is best defined as a process in which a. carbon changes from inorganic forms to organic forms and back b. carbon is changed into other elements such as oxygen or nitrogen c. carbon is continually created from the sun’s energy by plants d. carbon is consumed and regenerated from other elements such as oxygen and nitrogen

Which soil would most likely be found in the arctic? andisols gelisols histosols spodosols

What is the role of pancreatic juice in digestion?