What system of your body would be activated if you were surprised?

what do the digestive, respiratory, circulatory, excretory systems have in common?

what would happen to the human body if one of the organ systems stopped working?

Which of these organisms have the greatest amount of cell specialized

Legumes, a type of plant, require rhizobia, a type of soil bacteria, to survive since these organisms fix nitrogen during photosynthesis. rhizobia use the legumes for food. what would most likely happen to the legume population if rhizobia suddenly became extinct?

What is the inability of an individual or a society to achieve a minimum standard of living known as ?