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Which trilobite characteristic did not change through time? a. shape of eyes c. number of body segments b. 3-lobed body d. number of spines d. number of spines is a trilobite characteristic does not change through time.

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The right answer is the lobed body.

The name trilobite comes from the subdivision of the body into three longitudinal lobes:

A medial lobe, the rachis,

And two lateral lobes, the pleura.

There is also a subdivision into three regions from front to back: the cephalon ("head"), the thorax and the pygidium ("tail").

Ans.

Trilobite is an arthropod, that belongs class Trilobita. This class includes a group of extinct marine arachnomorphs. The characteristic represented by trilobites, throughout the life is presence of a three-lobed body.

As their name suggest, trilobites had three longitudinal lobes, named as a central axial lobe, and two flanked lobes or pleural lobes.

Thus, the correct answer is option) b). '3-lobed body.'

 

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