Answer:Higher levels of organization are built from lower levels. Therefore, molecules combine to form cells, cells combine to form tissues, tissues combine to form organs, organs combine to form organ systems, and organ systems combine to form organisms.
Explanation:
Answer:
yes
Explanation:
an hypothesis is a guess based on observation
<span>The ring of muscles that guards the opening between the stomach and the duodenum is the </span>pyloric sphincter
