Because so few bacteria can be grown easily in culture,but all of them contain DNA,molecular techniques like PCR and SSU rRNA are used to be able to identify and quantify microorganisms as a "census" for diversity.

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Yes, this statement is true. PCR and SSU rRNA are commonly used molecular techniques to identify and quantify microorganisms, especially those that cannot be easily grown in culture. By targeting specific DNA sequences or ribosomal RNA, researchers can detect and characterize different types of bacteria, fungi, or other microorganisms present in a sample. This allows them to generate a more comprehensive "census" of microbial diversity in different environments, such as the human gut, soil, water, or air.

Because So Few Bacteria Can Be Grown Easily in Culture,but