Which of the following is a non-contact force? magnetic force frictional force force applied by a boatman on the oars force applied by a table on a book placed on it

Which of the following produces carbon dioxide? a. plants b. animals c. decomposers d. all of the above

Which direction does the energy flow in this energy pyramid ?

Migration is a. the movement of organisms from a native location to a foreign location b. the movement of organisms from a foreign location to a native location the movement of organisms from their water supply to their food supply d. the seasonal movement of organisms between locations c. select the best answer from above