Who is credited with proposing that prebiotic chemical conditions could lead to the evolution of complex molecules and, eventually, to living organisms?
A) Alexander Oparin and John Haldane
B) Stanley Miller
C) Francisco Redi
D) Louis Pasteur
E) Sidney Altman
A
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Which of the following statements about homeostasis is false?
A. It depends primarily on positive feedback. B. It is the maintenance of a steady physiological state within an organism or cell. C. It is necessary for proper functioning of the body. D. The endocrine system plays a major role in maintaining homeostasis. E. None of the answer options is false.
An example of one of the ways a pH buffer helps to maintain homeostasis is to
A. increase the H+ concentration if pH decreases. B. reduce the H+ concentration if pH decreases. C. reduce the H+ concentration if pH increases. D. increase the OH- concentration if pH increases. E. reduce the OH- concentration if pH decreases.
Radioisotopes are used in all of the following scientific applications except:a
dating fossils. b. determining the sequence of genetic information in DNA. c. localization of a drug, such as marijuana. d. the treatment of cancer. e. measuring the pH of the blood
Choose the letter of the best match from the following:A. Birth control pillB. Intrauterine deviceC. DiaphragmD. Foams and jelliesE. VasectomySperm blockage.
Fill in the blank(s) with the appropriate word(s).