A population that differs significantly from other populations of the same species is known as a
A. breed.
B. subspecies.
C. variety.
D. All of these answers are true.
D. All of these answers are true.
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Which of the following bacteria is the most common cause of antibiotic-associated diarrhea?
A) Clostridium difficile B) Escherichia coli C) Salmonella enteritidis D) Shigella sonnei
Signaling molecules act locally or regionally to ________
a. all of the choices b. influence gene expression only c. regulate growth, development, and reproduction only d. adjust metabolism only
A horizontal stem modified to penetrate the substrate and anchor a plant is a ____
a. vascular system b. protonema c. sporangium d. rhizome e. shoot system
Refer to Figure 44-3. A semilunar valve regulates blood flow into which structures?
a. 1 and 2 b. 1 and 5 c. 1 and 7 d. 2 and 7 e. 7 and 11