If you were designing a new operation for temporary relief of poorly oxygenated tissues in one part of the thorax, you could try to bypass blood from what vessel to that tissue?
A. pulmonary vein
B. superior vena cava
C. pulmonary artery
D. hepatic vein
E. None of the answer choices is correct.
A. pulmonary vein
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Salmon are able to live in both fresh water and salt water. Salmon are therefore:
A. conformers. B. regulators. C. conditioned. D. effectors.
photoautotrophs (certain plants & bacteria)
What will be an ideal response?
Before cell division of somatic cells, each chromosome must be replicated. After replication, the resulting two parts of each chromosome are held together by cohesin at the centromere. These two parts are referred to as
A. genes. B. homologous chromosomes. C. daughter chromosomes. D. sister chromatids. E. kinetochores.
Courtship for Anolis lizards involves the male displaying a dewlap (skin under the throat area) that varies in appearance based upon the species. Lizards that are found in darker, more shaded environments will have dewlaps that are lighter in color because they are more noticeable by potential mates. Which of the following mechanisms best explains how speciation is at work in this example?
A. Genetic drift B. Postzygotic isolation C. Natural selection D. Reinforcement