Which branch of biology deals especially with microscopic forms of life such as bacteria, protozoans, viruses, and fungi?

• A. Microbiology
• B. Virology
• C. Ecology
• D. Anatomy

Answer: (A)

Microbiology focuses on living things too small to see with the naked eye, including bacteria, fungi, protozoa, and viruses, and it covers their structure, metabolism, genetics, growth, and interactions with hosts and environments. While virology studies viruses specifically, microbiology as a whole encompasses all these microscopic organisms, giving it the broad scope needed to understand how they live, reproduce, and impact health and disease. Ecology and anatomy deal with different scopes—ecology looks at relationships among organisms and their environments, and anatomy studies the form and structure of organisms—so they aren’t centered on microscopic life in the way microbiology is.