Trilobites were rapidly evolving and widespread marine organisms that spanned a number of geologic time periods. Certain types of trilobites only appeared in specific segments of geologic time; therefore, when one of these trilobites is found, you can be certain that the rock layer it is found in is of a certain geologic age.
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wait bilboard are you still in school?Anyways it could have been how Texans improved and modified their environment.
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Hope this helped and sorry its late.
The correct answer to this question is letter "d. none of the above." Representatives from all member nations are not represented in the un general assembly, the un veto group, the un security council. This is the correct answer as far as the representative is concerned.
