Which result might be a consequence of stabilizing selection?
A. There is an increase in antibiotic-resistant strains of bacteria.
B. Infants born with weights between 3 and 4 kg have a higher survival than infants much lighter or heavier at birth.
C. There is a decrease in the number of different breeds of dog.
B. Infants born with weights between 3 and 4 kg have a higher survival than infants much lighter or heavier at birth.
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Which is most analogous to the role of GFP in recombinant DNA technology?
A. Creating a metagenomic library representing archaea bacteria that thrive in the hot springs of Yellowstone National Park. B. Comparing the RFLP patterns of DNA from various suspects to DNA isolated from the scene of a crime using gel electrophoresis. C. Monitoring the spread of multi-drug resistant pathogens on a hospital floor by comparing antibiotic susceptibility patterns. D. Using dyes to stain and detect bacteria under light microscopy from the sputum of a patient diagnosed with tuberculosis.
If it were found that all animals except the Parazoa had a particular set of genes, one could conclude:
A. that those genes are not useful in interpreting phylogeny B. that Darwin was incorrect in his idea about descent with modification C. that the Parazoa are not animals D. that those genes probably are related to the embryonic formation of tissues E. None of the other choices offered are realistic
What is the equivalent of the mammalian mouth and nose in the respiratory system of insects?
A. Alveoli B. Tracheoles C. Spiracles D. Epithelial tissue
Which of the following ions is associated with auxin and used during signal transduction that causes a plant to bend towards a light source?
A. H+ B. Ca2+ C. Mg2+ D. Na+