Most of the oxygen in the blood is transported
A) by white blood cells.
B) in the plasma.
C) as bicarbonate ions.
D) bound to hemoglobin.
E) combined with carbon dioxide.
D
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Which conclusion can be drawn from Gause's experiments on interspecific competition between two species of
Paramecium that are cultured together and feed on the same resource?
a. Both populations of Paramecium expire due to a build-up of waste products. b. One population of Paramecium used the other as a food source. c. Paramecium populations survive well together because they have no limiting resources. d. When two populations of Paramecium use the same limiting resource, they can coexist long term. e. When two populations of Paramecium use the same limiting resource, they cannot coexist long term.
Compare the graphs in the figure above of carbon dioxide (CO2 ) emission for Cormocephalus morsitans and Scutigerina weberi. What hypothesis can you make about each centipede's habitat?
A) C. morsitans lives in a habitat that provides more carbon dioxide than does S. weberi. B) C. morsitans lives in a habitat with more predators than does S. weberi. C) C. morsitans lives in a colder habitat than does S. weberi. D) C. morsitans lives in a drier habitat than does S. weberi.
A turgid cell that you are studying has a solute potential of ?1.3MPa. What is its approximate water potential?
A. 0.3 B. ?2.3 C. ?0.3 D. ?1.3 E. 1.3
An example of a fomite would be:
A) a drinking glass used by a patient. B) bandages from an infected wound. C) soiled bed linens. D) all of the above