Without proofreading, the rate of errors in DNA replication in bacteria is as high as about one for
every ____ nucleotides assembled.
a. 10 to 100
b. 100,000 to 1,000,000
c. 1000 to 10,000
d. 10,000,000 to 100,000,000
e. 100,000,000 to 1,000,000,000
C
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It has been hypothesized that fungi and plants have a mutualistic relationship because fungi provide critical nitrogen for the plants' use. How do we know this happens? In experiments using radioactively labeled _____
A) nitrogen, plants acquired more radioactive nitrogen when they were associated with fungi B) nitrogen, labeled nitrogen showed up in fungi when the fungi were with symbiotic with plants C) nitrogen, when plants were associated with fungi, the plants could fix labeled nitrogen D) proteins, plants transported labeled proteins to adjacent fungi
The distinctive feature of chloroplasts is that they contain a green pigment called:
A. Gram stain. B. chlorophyll. C. hemoglobin. D. chromatin. E. keratin.
Exposed plant tissues are covered by ________ tissue
a. ground b. shoot c. dermal d. vascular
Some plants use metabolic resources for making flowers smell, while others do not
Indicate whether the statement is true or false.