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Taxonomists and other scientists will look for a variety of structural characteristics to classify an animal. Some of the major characteristics are: presence or absence of a backbone (vertebrate versus invertebrate), presence and type of symmetry (bilateral, radial, etc), type of circulatory system (open or closed), adaptations of the extremities (wings, specialized limbs, etc) and structure of the heart (number and orientation of chambers).

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Why is it important for a taxonomist to look at patterns of development when trying to classify animals?

Taxonomist must look at patterns of development to help distinguish species because some species may look similar. Taxonomist can study one class of animals for years in order to get the classification just right.


How did Aristotle contribute to animal classification?

Aristotle created a system of classifying animals based on their shared physical characteristics, grouping them into broad categories like mammals, birds, and fish. He also recognized the importance of observing and cataloging different species to understand their biology and behavior, laying the foundation for future advancements in animal classification.


Which animal phylum has the lowest structural organisazation?

The phylum Porifera, which includes sponges, has the lowest structural organization among animal phyla. Sponges lack true tissues and organs, instead consisting of loosely organized cell layers that perform basic functions like feeding and reproduction.


Annelids are the first of the animal phyla studied to have what general characteristic?

Annelids are the first animal phyla to have a true body cavity (coelom), which is enclosed by mesoderm. This cavity enables more complex organ systems and allows for greater specialization of body functions.


What is the scientific name for animal adaptation?

The scientific term for animal adaptation is "biological adaptation." It refers to the process by which a species evolves over time to better survive and thrive in its environment. Adaptations can be structural, physiological, or behavioral.

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