Question

a marine biologist dredges up a small animal from the bottom of the ocean. it is uniformly segmented, with short, stiff appendages and soft, flexible skin. it has a complete digestive system and a closed circulatory system, plus multiple true coeloms. based on this, you determine that the animal must be a(n) . see concept 33.3

Answer 1

Given the characteristics mentioned in the question, the animal must be an annelid.

What is an annelid?

Annelids, (Phylum name annelida) segmented worms, characterized by having body cavities (or body coelom), mobile bristles (or setae), and bodies segmented by transverse rings. The body cavity is reduced in leeches, and the bristles are devoid of some specialized morphology, including leeches. An important phylum of invertebrates in the animal kingdom, Annelida, consists of more than 9,000 species divided into three classes: Sea worms (polychaetes) are divided into motile and sedentary or tube-dwelling forms. earthworms (Oligochaeta); and leeches (Hildinea). Annelids are coelomic and tridermal.

General characteristics of annelids are:

1. They show organization at the organ system level.
2. Your body is segmented.
3. They breathe through their body surfaces.
4. The kidney is an excretory organ. They have well-developed circulatory and digestive systems.
5. Common names for more familiar annelids include earthworms, sandworms, annelids, bristleworms, and leeches.

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