A period of geographic isolation always results in the evolution of reproductive isolation
a. true
b. false
Answer: b. false
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Which of the following diseases is caused by a prion?
A) polio B) Zellweger syndrome C) Tay-Sachs disease D) infantile Refsum disease E) mad cow disease
Blood collected from a victim at a crime scene contains 30% adenine. A short distance away, a knife is found with traces of blood containing 20% thymine. What conclusion can be drawn from this evidence?
a. The blood on the knife belonged to the killer. b. The blood on the knife belonged to the victim. c. The knife was not the murder weapon. d. Further DNA sequencing is required.
The function of the epiglottis is to
A) keep the bronchi from collapsing. B) produce surfactant. C) assist the vocal cords in sound production. D) facilitate gas exchange in the lungs. E) prevent food from entering the larynx.
All of the following disrupt the cytoplasmic membrane except ____
A. Detergents B. Quaternary ammonium compounds C. High concentration phenols D. Iodine