In the electron transport system, the final hydrogen (electron) acceptor is
A. oxygen.
B. ATP.
C. acetyl.
D. NAD.
A. oxygen.
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Choose the true statement about synteny.
A. Synteny refers to the conservation of gene order along chromosomes. B. Synteny refers to the constancy of chromosome numbers in related clades. C. Synteny results from polyploidization events. D. Synteny refers to the rearrangement of gene order due to inversions. E. Synteny is only observed in closely related clades.
If a cross section of a eudicot herbaceous stem were compared with the cross section of its root the primary difference would be.
A. location of dermal tissue B. location of ground tissue C. location of vascular tissue D. location of terminal buds E. All of the choices are correct
Plants can generally absorb and make use of nitrogen in the form of ____
a. NO3- only b. both NO3- and NH4+ c. NH4+ only
d. N2 only e. both N2 and NH4+
A reciprocal exchange in which two DNA molecules with the same nucleotide sequence break and rejoin in a crossover is called ________ recombination.
A. replicative B. homologous C. site-specific D. None of the choices are correct.