OESOPHAGUS STOMACH
ECHINODERMS
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Radial
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Bilateral
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Asymmetrical
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None of the above
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Detailed explanation-1: -In this respect, arthropods are built like humans are; the right half of an arthropod is a mirror image of its left half-this is called bilateral symmetry (bi = two, latus = side).
Detailed explanation-2: -All arthropods posses an exoskeleton, bi-lateral symmetry, jointed appendages, segmented bodies, and specialized appendages.
Detailed explanation-3: -Bilateral symmetry involves the division of the animal through a sagittal plane, resulting in two mirror-image, right and left halves, such as those of a butterfly, crab, or human body. Animals with bilateral symmetry have a “head” and “tail” (anterior vs. posterior), front and back (dorsal vs.
Detailed explanation-4: -Ciba Found Symp. 1991; 162:94-120; discussion 121-7.
Detailed explanation-5: -Annelids and arthropods are bilaterally symmetrical, that is, the body can be divided into two identical halves only along one imaginary plane.