Classification

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An important feature of modern classification systems is that they —

Escherichia coli is the scientific name of a bacterium. What category of classification is Escherichia?

According to the biological definition of a species, which organisms listed below would belong to the same species?

What structure is common to all five kingdoms of living organisms?

During a trip to a rain forest, a scientist discovered a new organism living near some rotting logs. The scientist observed that the organism had moist skin, no hair, and an internal skeleton and that it laid eggs. This organism was probably a -

One method of determining the classification of an animal is by comparing the amino acid sequence. Which of these animals most closely resembles this unknown animal? Met-Gly-Ser-Tyr-Tyr-Arg-His-His-Glu-Lys-Asp

Bivalves, such as clams, are found in salt water. The clam captures food particles from water that flows over its gills. Which of these is the best classification of the clam?

Ascidians are sac-like marine organisms. Their larvae have well-developed brains and dorsal nerve cords. This suggests that ascidians should be classified with the —