What is the importance of the Miller-Urey experiment?
a. It showed that molecules crucial to life could be produced biotically.
b. It showed that molecules crucial to life could be produced abiotically.
c. It showed that molecules not crucial to life could be produced biotically.
d. It showed that molecules not crucial to life could be produced abiotically
Ans: b. It showed that molecules crucial to life could be produced abiotically.
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A solution of starch at room temperature does not readily decompose to form a solution of simple sugars because _____
A) the starch solution has less free energy than the sugar solution B) the hydrolysis of starch to sugar is endergonic C) the activation energy barrier for this reaction cannot easily be surmounted at room temperature D) starch cannot be hydrolyzed in the presence of so much water E) starch hydrolysis is nonspontaneous
Growth and development in all insects includes both molting and metamorphosis
A. true B. false
Infectious protein particles are called ________.
A. viroids B. spikes C. oncogenic viruses D. phages E. prions
Which of the following is (are) true of fevers up to
about 39ºC (102ºF)? They a. enhance immunity. b. increase phagocyte activity. c. accelerate tissue repair. d. slow microbial growth. e. do all of these.