Because geneticists can't use human subjects for experimentation, a ____ is used to obtain an analysis
of a genetic family history.
a. blood test
b. hair sample.
c. tooth impression.
d. pedigree chart.
e. photograph analysis.
D
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Respond to statements 126–129 with reference to the four glands
or structures of the mammalian gastrointestinal tract listed below. a. salivary glands b. stomach mucosa c. intestinal mucosa d. pancreas M 126. The enzyme pepsin is produced there. M 127. The enzyme carboxypeptidase is produced there. D 128. The fat-digesting enzyme, lipase, is formed there. D 129. The peptide-digesting enzyme, aminopeptidase, is produced there.
_____ are an example of seedless vascular plants.
a) Pine trees b) Mosses c) Charophyceans d) Ferns e) Lilacs
The pressure flow mechanism in phloem is initiated and maintained by _________.
A. The high water potential of soil water driving water flow throughout the plant B. Active transport of ions such as H+ and K+ into the phloem at many sites along the phloem tissue C. Loading substances, such as sucrose, into sieve-tube elements at sources and unloading them at sinks D. Water flowing from source to sink by osmosis E. Loading of sucrose into the phloem sink by osmosis
Bacteria that require special growth factors and complex organic substances are called
A. harmless. B. aerobic. C. anaerobic. D. fastidious. E. pathogenic.