One problem with using common names is that
a. many organisms may have the same common name.
b. many common names may exist for the same organism.
c. the common name may vary by language and region.
d. all of the above are true.
c
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Phylogenetic trees are usually constructed using either a distance-based ________ approach, or a characteristic ________ approach.
Fill in the blank(s) with the appropriate word(s).
When a farmer grows cotton containing the gene for Bt toxin, they often leave a strip of non-Bt cotton around the outside of the field for what reason?
A. because the non-Bt cotton does not drive the moths and caterpillars to extinction B. because the non-Bt cotton grows better C. to allow some RR bollworm caterpillars to survive and limit selection pressure for resistance D. to allow some rr bollworm caterpillars to survive E. to allow the non-Bt and Bt cotton plants to cross-pollinate
Intermediate filaments anchor the proteins actin and myosin that are involved in
a. muscle contraction. b. digestion. c. detoxification. d. oxygen transport. e. flagellar movement.
An enzyme binds its substrate at the active site
__________________ Indicate whether the statement is true or false.