A pure culture contains
A. only one species of microorganism.
B. only bacteria.
C. a variety of microbes from one source.
D. a variety of species from the same genus.
E. None of the choices is correct
A. only one species of microorganism.
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Allergic rhinitis is also known as asthma.
Answer the following statement true (T) or false (F)
Which of the following observations about flagella is true and is consistent with the scientific conclusion that the flagella from protists and bacteria evolved independently?
A) The flagella of both protists and bacteria are made of the same protein, but the configuration is different. B) The mechanics of movement and protein structure are the same in these flagella, but there are significant genetic differences. C) Although the mechanism of movement in both flagella is the same, the protein that accomplishes the movement is different. D) The protein structure and the mechanism of movement in protist flagella are different from those of bacteria flagella.
The overall process that refines the filtrate and ultimately returns water and valuable solutes to the blood is known as
A) reabsorption. B) excretion. C) filtration. D) secretion.
For the following questions, choose the letter from the list below that best matches the description (please note the answer should be a single uppercase letter):A. desertB. savannaC. taigaD. temperate grasslandE. tropical rain forestHigh productive agricultural soils; long, cold winters; perennials; grazing mammals and burrowing rodents; fires.
Fill in the blank(s) with the appropriate word(s).