13. Enzymes for respiration are present in: a. Both animal and plant cells
O b. Animal cells, but not in plant cells
O c. Plant cells, but not in animal cells
O c. Neither animal nor plant cells

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

Cells destroy body cells infected by a virus or bacteria.

Which could be a pathway of food through an ecosystem