You would like to culture a bacterium that is growing in the lung of a human patient with pneumonia. Which media would be of most use in culturing this organism?
A. Complex medium supplemented with whole blood
B. Transport media
C. Mannitol salt agar
D. MacConkey's agar
E. None of the choices are correct.
Answer: A
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Diffusing molecules move ________ until they are ________
A) up their concentration gradients; unevenly distributed B) through channels of active transport proteins; evenly distributed C) down their concentration gradients; evenly distributed D) up their concentration gradients; evenly distributed E) down their concentration gradients; unevenly distributed
In a lichen, the fungal partner
A. provides a substratum within which the alga grows. B. provides water and minerals to the alga. C. protects the alga from excess light intensities. D. All of the choices are correct.
Imagine a red blood cell leaving the right ventricle of your heart. To which chamber of the heart will that cell return first?
A. right atrium B. left ventricle C. right ventricle D. left atrium E. It is impossible to say from the information given.
Which of these characteristics is not found in both land plants and green algae?
1.cellulose in their cell walls 2.produce spores in sporangia 3.store energy captured during photosynthesis as starch 4.light-absorbing pigments include both chlorophyll a and chlorophyll b