In the reaction A ? B + C + heat
A) there is a net input of energy.
B) the potential energy of the products is greater than that of the reactant.
C) the potential energy of the products is less than that of the reactant.
D) entropy has decreased.
Answer: C
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To identify the optimal phylogenetic tree from multiple potential trees, many systematists use the ____, which states
that the simplest plausible explanation of any phenomenon is the best.
a. maximum likelihood method b. principle of parsimony c. genetic distance method d. gradual phyletic hypothesis e. punctuated equilibrium hypothesis
How do the pyramids of biomass for Silver Springs, Florida, and the English Channel compare?
a. They are both typical of most ecosystems. b. They both indicate that producers are quickly eaten by herbivores. c. The pyramid for Silver Springs is typical of most ecosystems and the English Channel pyramid indicates that producers are quickly eaten by herbivores. d. The pyramid for Silver Springs indicates that producers are quickly eaten by herbivores, and the English Channel pyramid is typical of most ecosystems. e. Both pyramids indicate overgrowth of producers.
How long does it take for the daughter cells from one round of replication to replicate themselves?
a. 20 minutes b. No time is required -- they are ready to divide immediately after DNA replication and separation of the daughter cells is complete if conditions are right. c. After the cells have matured fully. d. No time is needed -- the daughter cells cannot replicate further.
If a strand of RNA has the sequence AAGCTC, transcription will result in __________________________________________________________________.
Fill in the blank(s) with the appropriate word(s).