An example of an ecosystem “good” is __________, and an example of an ecosystem
“service” is __________.
a. cleansing of air; cleansing of water
b. food; storage of minerals
c. storage of minerals; food
d. tourism; medicines
B
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Repeating the sequence of the polymerase chain reaction doubles the number of DNA fragments each time
a. True b. False Indicate whether the statement is true or false
Members of subphylum _______ prefer humid environments, and have legs numbering from 10 to 750.
a. Chelicerata b. Hexapoda c. Myriapoda d. Crustacea
A type of monocyte that has long, thin processes to trap pathogens is a(n) ________.
A. dendritic cell B. macrophage C. eosinophil D. mast cell E. platelet
The normal flora of the adult large bowel consists predominantly of:
a. anaerobic species. b. Staphylococcus. c. Enterococcus. d. Enterobacteriaceae.