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The field of zoology seeks to comprehend every aspect of animal existence in diverse habitats, both on land and in water. This encompasses:
creatures that humans domesticate or raise, including farm animals, research subjects, and companion animals
organisms that pose significant threats as pests or pathogens
species that play vital roles in ecosystems and serve as cornerstone organisms in biological communities
Regardless of an animal's ecological niche, scientists strive to understand its actions, population trends, biological functions, and relationships with other species and surroundings.
Consequently, zoology integrates knowledge from all disciplines within biological sciences - ranging from cellular and molecular biology to developmental studies, parasitology, ethology, population dynamics, and ecological studies - all grounded in evolutionary principles.