The pumonary artery contains oxygenated blood.
a. true
b. false
Answer: b. false
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The first line of plant defense against pathogen infection is(are) the:
A. cuticle. B. plasmodesmata. C. stomata. D. pathogens. E. cell walls.
How does it relate to the question?
What will be an ideal response?
What are the two main atoms that are found in organic compounds?
a. Carbon and Oxygen b. Hydrogen and Carbon c. Hydrogen and Sodium d. Nitrogen and Hydrogen e. Hydrogen and Oxygen
If you wished to study the SOS response in Escherichia coli, which of the following experimental procedures could be used?
A. Transfer log phase cells from complete medium to thymine minimal medium. B. Inactivate genes that encode DNA polymerases. C. Expose cells to nonionizing radiation for 20 minutes. D. Expose cells to ionizing radiation for 10 minutes. E. All of the choices are correct.