In Chapter 2, you learned about beneficial bacteria that live on our skin and lower the pH,
which in turn keeps other disease-causing bacteria in check. This relationship between
beneficial bacteria and their human hosts is an example of __________.
a. coevolution
b. adaptive radiation
c. sexual selection
d. mutation
A
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Each pollen grain consists of __________ cell(s) covered in an outer coat
a. one b. two c. three d. four
The female gametophyte of a flower develops
within a(an)
a. stigma. b. anther. c. calyx. d. corolla. e. ovule.
The detection of nucleotides as they pass through an automated DNA sequencing machine is made by
a. radioactivity. b. fluorescence. c. antibiotic resistance. d. electron microscopy. e. gel electrophoresis.
Which of the following is not true concerning the structures labeled 4 in Figure 37-3:
a. They are the cotyledons. b. They indicate that this plant is a eudicot. c. They are part of the embryo. d. They are surrounded by endosperm. e. They are derived from the integuments.