What is the key function of sphincters found along the digestive system? a. they selectively allow and stop passage of partially digested food. b.they control and direct the quantity of food passing through the digestive organs and prevent backward movement of partially digested food. c.they improve the muscular strength of the organs involved in digestion.

In the united states there are strict fishing seasons and limits, but not all countries enforce similar laws. in bangladesh there are few if any fishing restrictions. what might be the reason for less restrictions in smaller countries like bangladesh? a) the united states is the only country worried about overfishing. b) the united states wants to limit the supply of fish to increase the price. c) bangladesh and smaller countries have an unlimited supply of fish in their coastal waters. d) small countries, such as bangladesh, are practicing subsistence fishing, taking only the fish needed to survive.