Question

question 1 (1 point) which term best describes an organism that cant exist in the presence of oxygen? microaerophile facultative anaerobe obligate anaerobe obligate aerobe question 2 (1 point) most mesophilic bacteria grow best at ph_________. 4 1 7 9

Explanation:

• For Question 1: Obligate anaerobes are organisms that cannot survive in the presence of oxygen as oxygen is toxic to them. Micro - aerophiles need low levels of oxygen, facultative anaerobes can grow with or without oxygen, and obligate aerobes require oxygen to grow.
• For Question 2: Mesophilic bacteria are bacteria that grow best at moderate temperatures, and most mesophilic bacteria grow best at a near - neutral pH of 7. A pH of 4 is acidic, 1 is highly acidic, and 9 is basic.

Answer:

Question 1: C. obligate anaerobe
Question 2: C. 7