Which of the following is not a symbiotic relationship? a. mutualism b. trophism c. commensalism d. parasitism

Which best describes a rhinovirus? o a. a virus that causes a common cold o b. a protective shell around a virus o c. a tube the comes off a virus o d. a piece of dna transferred by a virus

When does the circulatory system work with the respiratory system? a. during blood cell formation b. during cellular respiration c. during intestinal digestion d. during a viral infection

Which enzymes break down carbohydrates?