객관식
Which of the following statements about marsupials in Australia is true?
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30. Overview of Animals
Overview of Animals
객관식
Which phylum is characterized by animals that have a segmented body?
A
Mollusca
B
Echinodermata
C
Arthropoda
D
Cnidaria
검증된 단계별 안내1
Begin by understanding the concept of segmentation in biology. Segmentation refers to the division of an organism's body into repetitive segments, which is a characteristic feature of certain animal phyla.
Review the characteristics of each phylum listed in the problem: Mollusca, Echinodermata, Arthropoda, and Cnidaria. Focus on identifying which phylum exhibits segmentation.
Mollusca are known for their soft bodies, often with a hard shell, but they do not have segmented bodies.
Echinodermata, such as starfish and sea urchins, have radial symmetry and a unique water vascular system, but they do not exhibit segmentation.
Arthropoda is the phylum characterized by animals with segmented bodies. This includes insects, arachnids, and crustaceans, which have bodies divided into segments such as the head, thorax, and abdomen.
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