Aperson constantly comes in contact with pathogens that can infect body cells and cause disease. which organ system is involved in protecting the body from both infectious and noninfectious diseases? a. muscular system b. nervous system c. immune system d. reproductive system

Parasitism could be considered a form of which of these types of relationships? -mutualism -commensalism -predator-prey -mimicry

Which of these is true for bacteria because they are prokaryotic cells? a. they can engulf body cells in order to make memory cells. b. they must invade viruses in order to reproduce. c. they are much larger than eukaryotic body cells. d. they can reproduce on their own outside of other cells.

Which of the following particles always has a positive charge? a. electronb. neutron c. proton d. ion