What is a retrotransposon, and how does it differ from typical transposons?
What will be an ideal response?
Most transposons move by a DNA-to-DNA mechanism, but retrotransposons (such as yeast Ty elements, Drosophila copia elements, and human LINEs and SINEs) transpose via an RNA intermediate using a transposon-encoded reverse transcriptase.
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Which of the following groups of animals is found in the same environment, and has similar heat storage adaptations, as cheetahs?
A. Gazelles B. Rhinos C. Giraffes D. Elephants E. Hyenas
If the histones are rearranged to control access to a gene, this is called
a. transcription. b. chromatin remodeling. c. DNA condensation. d. remodeling complex formation. e. acetylation.
Which tissue type will move the body? a. Muscle b. Nerve c. All of these choices
d. Epithelial e. Connective
Earth is tilted about how many degrees on its axis?
a. 8 b. 15 c. 23 d. 30 e. 38