Which elements, besides carbon, are found in all four types of
macromolecules?
o
a. oxygen and nitrogen
o
b. hydrogen and phosphorus
o c. hydrogen and oxygen
o
d. nitrogen and phosphorus

Sammi is studying the interaction of the digestive and circulatory systems in the human body. she has listed various processes that occur in each of the systems. put the processes in order to describe the interaction between these two systems. tiles nutrients diffuse through the villi of the small intestine. digestive processes break nutrients down in the mouth, stomach, and small intestine. blood is pumped through the circulatory system to deliver nutrients to other organs. nutrients are ingested at the mouth. nutrients enter the capillaries of the circulatory system. sequence

The influenza virus cause the flu, but not other diseases. why?

Which of the following can be reduced by the use of renewable energy sources? a. social costs b. economic costs c. environmental costs d. all of the above select the best answer from the choices provided a b c d