Apatient's blood is tested, and the substance found in the blood is living, microscopic, and responsible for the patient's tuberculosis. which substance is making the patient ill?

a. bacteria

b. mold

c. algae

d. virus

Eukaryotic cells are theorized to have evolved from prokaryotes called the endosymbiotic theory. this explains that the most primitive eukaryotic cell engulfed a prokaryotic cell (by the process of phagocytosis) that is capable of cellular respiration and another prokaryotic cell that is capable of photosynthesis. these prokaryotic cells eventually became organelles and these organelles are the mitochondria and the chloroplast

Because the carnivores keep the herbivore population in check 

The answer is nucleic acid