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Question

Select the correct option of animal groups which possess all the characteristics.

Consider the following features:

(a) Organ system level of organization

(b) Bilateral symmetry

(c) True coelomates with segmentation of body


A

Annelida, Mollusca and Chordata.

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B

Annelida, Arthropoda and Chordata.

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C

Annelida, Arthropoda and Mollusca.

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D

Arthropoda, Mollusca and Chordata

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Solution

The correct option is B

Annelida, Arthropoda and Chordata.


The correct option is B.

Explanation of the correct option:

  1. When the body of an organism is divided into segments both internally and externally so that each of the segments have repetition of some organs is known as true segmentation.
  2. Annelida, Arthropoda, and Chordata all have true segmentation.
  3. They are true coelomates with an organ-system level of organization and bilateral symmetry.

Explanation of the incorrect options:

Annelida and Mollusca all have a true coelom, organ-system level of organization, and bilateral symmetry; however, Mollusca has an unsegmented body.

Final answer: The correct option for animals that possess all the characteristics are Annelida, Arthropoda, and Chordata.


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