Oxygen enters the blood in the A. Bronchi.
Plant cells have cell walls, while animal cells don't have cell walls.
Answer:
Oil workers activities involved in the exploration of crude oil and natural gas creates pollution which affects the ecosystem negatively. The various pollutions cause the death of plant and animal life both on land and in water bodies.
The oil workers should be more careful in their activities to prevent oil spillage as much as possible and if there is any at all then there should be adequate measures in the cleaning it up efficiently through biological and harmless chemicals.
C. <span>The duodenum is a separate anatomic structure. It is the first part of the small intestine after the stomach. </span>
