In reviewing historical records and ice core data, researchers noted that atmospheric CO2 levels started to rise as humans began to burn fossil fuels. This is an example of what type of relationship?
A. correlation
B. symbioses
C. causation
D. antagonism
E. conduction
A
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During chemical evolution, which of the following occurred in the molecules involved?
A) Entropy decreased while potential energy increased. B) Entropy increased while potential energy increased. C) Entropy stayed constant while potential energy increased.
Chargaff found several facts about the base composition of DNA. One of these rules is
a. There is a 1:1 relationship between G and T. b. There is a 2:1 relationship between purines and pyrimidines. c. The amount of A equals the amount of T. d. The amount of purines is half the amount of pyrimidines. e. None of these are true.
What types of antigens are most susceptible to the action of precipitins?
A. Antigens on bacterial surfaces B. Host cellular antigens C. Antigens on the surface of viral particles D. Soluble antigens
The solvent, cohesive, and temperature stabilization
properties of water are due to its a. ability to promote hydrophilic interactions. b. ionic bonds. c. hydrogen bonds. d. ability to promote hydrophobic interactions. e. nonpolar nature.