Which two factors determine whether a reaction is spontaneous?
a. free energy and activation energy
b. activation energy and enthalpy
c. enthalpy and entropy
d. entropy and activation energy
e. activation energy and energy coupling
ANSWER: c
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Assume that a Chi-square test was conducted to test the goodness of fit to a 3:1 ratio and that a Chi-square value of 2.62 was obtained
Should the null hypothesis be accepted? How many degrees of freedom would be associated with this test of significance?
When one plant is shaded by another, why is the ratio of far-red to red light increased compared to an unshaded plant?
A. Auxin absorbs mostly far-red light. B. Shade is enriched in far-red wavelengths of light. C. Phytochrome in the taller plant absorbs most of the red light. D. Far-red light mostly reflects off the surface of the soil while red light is mostly absorbed. E. As light passes through the leaves of the taller plant, most of the red light is absorbed by chlorophyll.
What does the following figure illustrate? (Each dot represents a pair of Drosophila species)
A. The strength of prezygotic isolation increases more rapidly between sympatric pairs of species than it does between allopatric pairs B. Drosophila species are more likely to diverge in sympatric distributions C. Genetic distance is greater in allopatrically speciating lineages D. Reinforcement of genetic reproductive isolation is more of a factor in speciation between allopatric than sympatric pairs
Which organelle is responsible for degrading waste within the cell?
A) Golgi apparatus B) lysosome C) endoplasmic reticulum D) ribosome E) chloroplast