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The concept of keystone species is controversial among ecologists because most organisms are highly interdependent. if each of the trophic levels is dependant on all others how can we say one is most important
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Match the functions to the cell types ? contraction and relaxation. conducting electrochemical signals fighting diseases carrying genetic material
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As kate is moving down the hill, what type of energy does she have? a. sound energy b. electrical energy c. light energy d. mechanical energy
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Which one of the following is true of trnas? a) trnas are double-stranded. b) each trna binds a particular amino acid. c) there are four types of trna. d) trnas carry special sequences known as codons. e) all of the above
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The theory that explains how the earths surface is made up of moving rocky plates is called: A. Supe...
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