Most anabolic steroids that are used to increase muscle mass are derivatives of the natural hormone ________.
Fill in the blank(s) with the appropriate word(s).
Answer: testosterone
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True or false: Supercoils in DNA are induced or relaxed by enzymes called topoisomerases
A. true B. false
True or false: Marine fish have impermeable renal tubules, allowing them to reabsorb scarce elecrolytes without also reabsorbing water they are trying to eliminate
A. true B. false
In the alveoli
A. oxygen diffuses into the blood while carbon dioxide diffuses out of the blood. B. oxygen diffuses out of the blood while carbon dioxide diffuses into the blood. C. both oxygen and carbon dioxide diffuse out of the blood. D. both oxygen and carbon dioxide diffuse into the blood. E. no exchange with the blood occurs.
Adaptations of thermophiles >55°C
What will be an ideal response?