The location of a gene on a chromosome is its
a. centromere.
b. locus.
c. autosome.
d. allele.
e. centriole.
B
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Interpreting stable isotopic fractionation depends on the fact that most enzymes preferentially bind ________ isotope substrates over ________ isotope substrates
A) nonradioactive / radioactive B) light / heavy C) heavy / light D) radioactive / nonradioactive
The conjugation bridge in an Hfr × F- mating usually breaks before chromosome transfer is complete; however, because at least part of the plasmid is transferred first, the recipient becomes F+.
Answer the following statement true (T) or false (F)
In phloem, organic compounds flow through _____
a. collenchyma cells c. vessels b. sieve tubes d. tracheids
The structure labeled 9 in Figure 29-2 was produced by:
a. fertilization of two zygotes. b. meiosis in the resting sporangium. c. meiosis in the zoosporangium. d. mitosis in the resting sporangium. e. mitosis in the zoosporangium.