The food moves from the esophagus to the stomach by muscular contractions and relaxations. what do we call these contractions and relaxations?

Which of the following is the goal of a personal care home? provide necessary services for individuals to live as independently as possible. emphasize how illnesses can restrict the daily lives of residents. restrict residents from in their own care.

Dr. leung has been studying consistent trends in how males and females have selected their mates throughout the long history of humankind. dr. dauphine is most likely a(n) psychologist.

You isolate an infectious substance capable of causing disease in plants, but you do not know whether the infectious agent is a bacterium, virus, viroid, or prion. you have four methods at your disposal to analyze the substance and determine the nature of the infectious agent.i. treat the substance with enzymes that destroy all nucleic acids and then determine whether the substance is still infectious.ii. microscope.iii. culture the substance on nutritive medium, away from any plant cells.iv. treat the sample with proteases that digest all proteins and then determining whether the substance is still infectious.if you already know that the infectious agent was either bacterial or viral, which method(s) listed above would allow you to distinguish between these two possibilities? a) ib) iic) ii or iiid) iv