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Which levels of animal life can zoologists study from molecules to populations?
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Zoology
Blue wildebeests (Connochaetes taurinus) drinking at the water's edge, Masai Mara, Kenya.
Zoology is the branch of biology that examines animal life across a vast spectrum of organizational levels. Zoologists study animals by investigating their constituent parts, beginning at the molecular level and extending through various levels of biological complexity.12
These levels of study include:
- Molecular and Cellular: Research focuses on the chemical reactions and components that form the basis of genetics, physiology, and development.2
- Tissue, Organ, and Organ System: Investigations involve the structural and functional units of individual animals, ranging from basic tissues to complex organ systems.2
- Organismic: The study of the individual animal as a whole.2
- Population and Ecosystem: Research encompasses entire animal populations, faunas, and the interactions between animals and their environment, including their relationships with plants and other organisms.12
Contemporary zoology emphasizes the structural and functional unity of life, integrating these diverse levels of inquiry to understand animals as a fundamental aspect of nature.13