What is the principle purpose of the muscular system?
Answer: Create movement
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Archaea have very diverse environmental requirements and tolerances. From what you have learned about them, which among the following conditions or substances do ALL archaeans require for survival and reproduction?
A. oxygen B. carbon C. moderate pH D. moderate temperature E. moderate salinity
Under which conditions would an endotherm have the lowest metabolic demands?
a. after eating a large meal b. sitting outside on a winter’s day c. sitting in front of the television d. jogging on a warm spring morning
Watson and Crick describe the relationship between ________ as a directional flow of information called the "central dogma".
A) nucleic acids and proteins B) enzymes and proteins C) peptides and polypeptides D) DNA and RNA
A dominant allele does not express itself in every person that contains it; occasionally parents without the characteristic have children that show the characteristic. This statement represents a feature known as
A. fitness. B. expressivity. C. recessiveness. D. penetrance.