Living organisms increase in complexity as they grow, resulting in a decrease in the entropy of an organism. How does this relate to the second law of thermodynamics?
A) Living organisms do not obey the second law of thermodynamics, which states that entropy must increase with time.
B) Life obeys the second law of thermodynamics because the decrease in entropy as the organism grows is exactly balanced by an increase in the entropy of the universe.
C) Living organisms do not follow the laws of thermodynamics.
D) As a consequence of growing, organisms cause a greater increase in entropy in their environment than the decrease in entropy associated with their growth.
E) Living organisms are able to transform energy into entropy.
Answer: D
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Which of the following features of DNA organization do eukaryotes and bacteria have in common (select all correct choices)?
A. DNA is associated with basic proteins. B. DNA is found within a 30 nm filament. C. DNA breakage in one loop will not affect DNA in other loops. D. A change of supercoiling in a cleaved loop would not affect other loops. E. Under electron microscope, DNA will have a beads-on-a-string appearance.
Match the specialized sense to the role it plays.
1. magnetic field receptors 2. pit organs 3. ampullae of Lorenzini ___ sense infrared radiation in prey ___ sense electrical currents from muscles ___ help long-distance migratio
A molecular clock is based on
a. measurement of daylength by pigment complexes. b. daily changes in amino acid sequence in specialized proteins. c. regulation of the order in which genes are turned on. d. precise oscillations of atoms in a crystal. e. a constant rate of mutation in DNA sequences.
Which of the following is NOT a product of transcription?
A) a new strand of DNA B) rRNA C) tRNA D) mRNA E) None of the answers are correct; all of these are products of transcription.