A Level Biology Practice Exam

What is the visual representation produced by a photomicrograph typically used for?

1. Studying molecular structures

2. Analyzing external morphology

3. Examining microscopic organisms

4. Displaying satellite images

The correct answer is: Examining microscopic organisms

A photomicrograph is a photograph taken through a microscope that provides a visual representation of objects that are too small to be seen with the naked eye. This technique is particularly useful in fields such as biology, where it allows researchers to examine microscopic organisms, including bacteria, protozoa, and tissue samples. By magnifying these small structures, scientists can observe their shapes, structures, and arrangements in detail, aiding in the study of their characteristics and behaviors. In contrast, the other options do not align with the primary use of photomicrography. Studying molecular structures typically requires techniques like X-ray crystallography or molecular modeling, while analyzing external morphology focuses on larger organisms or systems that are visible to the naked eye or under low magnification. Displaying satellite images pertains to geospatial analysis and mapping, which is unrelated to the microscopic examination provided by a photomicrograph.