On average, adolescent student's grades improve during the course of schooling.
a. true
b. false

a. True

Explanation:

Based on many research studies conducted on grade difference's of adolescents during a school year it can be said that on Average the adolescents student's grades do improve. This can be attributed to the constant repetition of problem solving methods and guidance from experienced teaching professionals. Regardless of effort placed by the student, constantly hearing a certain information will cause you to remember and therefore increase your test grades.

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answer: a. a gene that causes a specific trait.

answer; //the above statement is (false);