The most abundant of the circulating white
blood cells are the
a. neutrophils.
b. macrophages.
c. mast cells.
d. eosinophils.
e. lymphocytes
A
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Which viral life cycle would result in a quicker death for an infected cell?
A. The prophage cycle B. The retroviral cycle C. The lysogenic cycle D. The lytic cycle
Which of the following statements is NOT
generally characteristic of parasites? a. They are specialists and usually are able to affect only one variety of hosts. b. They inflict serious injury and kill their hosts. c. Some reside inside their hosts, whereas others live outside their hosts. d. Their host may be a plant as well as an animal. e. Plants as well as animals can be parasites
Ecosystems obtain essential raw materials from
a. the components of water molecules. b. mineral ions dissolved in water. c. the weathering of rocks. d. the atmosphere. e. all of these.
A beaker contains 100 milliliters (mL) of NaOH solution at pH = 13. A technician carefully pours into the beaker 10 mL of HCl at pH = 1. Which of the following statements correctly describes the result of this mixing?
A) The concentration of Na+ ions will rise. B) The pH of the beaker's contents will increase. C) The pH of the beaker's contents will be neutral. D) The pH of the beaker's contents will decrease.