Bacterial strains that do not grow in the absence of a specific nutrient are calle

Bacterial strains that do not grow in the absence of a specific nutrient are called auxotrophs.

Here are the steps to answer this question:

1. Understand the question: The question is asking for the term used to describe bacterial strains that cannot grow without a specific nutrient.

2. Recall relevant information: In microbiology, organisms that require a specific nutrient that they cannot synthesize themselves are referred to as auxotrophs. This term is often used in the context of bacteria and yeast.

3. Formulate the answer: Therefore, bacterial strains that do not grow in the absence of a specific nutrient are called auxotrophs.