Question

10 multiple choice 1 point if a yeast strain requires a nutrient for survival, it is called an autotroph an auxotroph a phototroph a heterotroph

Explanation:

To solve this, we analyze each term:

• Autotrophs produce their own nutrients (e.g., plants via photosynthesis).
• Auxotrophs are organisms (like yeast) that require specific nutrients (e.g., amino acids, vitamins) not needed by wild - type strains for growth/survival.
• Phototrophs use light as an energy source (e.g., some bacteria, plants).
• Heterotrophs obtain nutrients by consuming other organisms (e.g., animals, most fungi).

Since the yeast strain needs a nutrient for survival, it matches the definition of an auxotroph.

Answer:

B. An auxotroph