Final answer:The smallest objects that biologists study under a microscope are typically cells and their components, such asorganellesand molecules.Explanation:Biologists use microscopes to explore the microscopic world, where they examine a variety of tiny structures. The smallest objects they study are cells, which are the fundamental units of life. Cells vary in size, with some being as small as a few micrometers, such as bacteria, while others, like human cells, can be up to 100 micrometers in diameter. Within these cells, biologists delve even deeper, investigating subcellular components like organelles (e.g., mitochondria, nucleus) and molecules (e.g., DNA, proteins). Organelles can be as small as a fraction of a micrometer, while molecules are often measured in nanometers. For example, a DNA molecule is approximately 2 nanometers wide.To put these sizes into perspective, one micrometer is equal to 1,000 nanometers. So, when biologists study structures at the cellular level, they are working with objects that are on the order ofmicrometersand nanometers. These tiny structures play critical roles in the functioning of living organisms, and by studying them, biologists gain insights into the complexity of life itself.In summary, biologists use microscopes to investigate the smallest objects in the biological world, ranging from cells, which can be a few micrometers in size, tosubcellularcomponents and molecules, which are often measured in nanometers. Understanding these tiny structures is essential for advancing our knowledge of biology and life sciences.Learn more aboutMicroscopebrainly.com/question/35353790#SPJ11...

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