I. INTRODUCTION
Biologists often spend their careers studying one specific organism or a group of closely related organisms. For example, a scientist may spend years researching the genetics of a single species of fruit fly (Drosophila melanogaster), the conservation status of turtles, the feeding preference of ants, the pollination of flowering plants, or the ecology of diatoms (photosynthetic protists). Those who study one organism, a single genus, or a family of closely related organisms can often identify these organisms by sight alone. However, considering that there are approximately 350 species of turtles, 22,000 species of ants, 100,000 species of diatoms, and over 250,000 species of flowering plants, it is impossible to memorize the appearance of so many organisms. Luckily, there is a system in place to help biologists identify almost every known organism down to the exact binomial (genus and species) nomenclature.
I. INTRODUCTIONBiologists often spend their careers studying one specific organism or a group of closely related organisms. For example, a scientist may spend years researching the genetics of a single species of fruit fly (Drosophila melanogaster), the conservation status of turtles, the feeding preference of ants, the pollination of flowering plants, or the ecology of diatoms (photosynthetic protists). Those who study one organism, a single genus, or a family of closely related organisms can often identify these organisms by sight alone. However, considering that there are approximately 350 species of turtles, 22,000 species of ants, 100,000 species of diatoms, and over 250,000 species of flowering plants, it is impossible to memorize the appearance of so many organisms. Luckily, there is a system in place to help biologists identify almost every known organism down to the exact binomial (genus and species) nomenclature.
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