Viruses cause most human cancers
Indicate whether the statement is true or false
FALSE
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Which of the following is incorrectly paired?
a. veins—typically carry deoxygenated blood b. capillaries—blood vessels with smallest diameter c. lymph vessels—contain mainly water and some blood cells d. alveolus—increases surface area for exchange
The bacterium that in part causes acne is
a. Propionibacterium b. Porphyromonas c. Streptococcus d. Lactobacillus e. Clostridium
Which of the following is considered to be most
closely related to land plants? a. red algae b. chlorophytes c. charophytes d. trypanosomes e. all of these
Papillary muscles:
A. contract when the ventricles relax B. prevent the valves from closing during ventricular diastole C. are attached to the semi lunar valves via the chordae tendineae D. prevent the backflow of blood into the atria during ventricular systole E. prevent the backflow of blood into the ventricles from the aorta