Here are some of the scientists who study organisms:

* Biologists: This is a broad term that encompasses scientists who study all aspects of life, from the smallest cells to the largest ecosystems.

* Zoologists: These scientists focus on the study of animals, their behavior, anatomy, physiology, and evolution.

* Botanists: These scientists specialize in the study of plants, including their structure, function, growth, and reproduction.

* Microbiologists: These scientists study microscopic organisms, such as bacteria, viruses, and fungi.

* Ecologists: These scientists study the interactions between organisms and their environment.

* Geneticists: These scientists study how genes are passed down from one generation to the next and how they influence an organism's traits.

* Physiologicalists: These scientists study the functions of living organisms, including their organs, systems, and cells.

* Taxonomists: These scientists classify organisms into groups based on their shared characteristics.

There are many other specialists within biology, but these are some of the most common.