Blue flower color (B allele) is dominant to white (b allele). In a population plants with white flowers (bb) are at a frequency of 0.04. What frequency of the alleles are for blue flower color (B)?
A. 0.04 or 4%
B. 0.16 or 16%
C. 0.06 or 60%
D. 0.8 or 80%
E. 0.96 or 96%
C. 0.06 or 60%
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The common species name of the virus is based on the
A. presence or absence of a nuclear membrane. B. type of nucleic acid it contains. C. disease the virus causes. D. geographic area it is found.
Archaeopteris, the first known tree, had what characteristics?
_____ It occurred in forests. _____ It possessed wood. _____ It reproduced by seeds. _____ It had a eustele. _____ It had a vascular cambium.
A neuron synthesizes and secretes substance D, which binds to a receptor on the neuron cell membrane, triggering an
influx of calcium. Substance D therefore is a ligand for a ____.
a. a receptor tyrosine kinase b. a G-protein-coupled receptor c. a hormone receptor d. a ligand-gated ion channel e. guanylyl cyclase
Alexander Oparin and John Haldane postulated that the early atmosphere was a reducing atmosphere. Why was this prediction an important one?
a. because the molecules contain the maximum possible number of protons that can be easily donated in reactions that lead to synthesis of complex molecules b. because the molecules contain the minimum possible number of electrons that can be easily donated in reactions that lead to synthesis of complex molecules c. because the molecules contain the maximum possible number of protons that can be easily accepted in reactions that lead to synthesis of complex molecules d. because the molecules contain the maximum possible number of electrons that can be easily donated in reactions that lead to synthesis of complex molecule