________ are kept close by at all times during preparation and used constantly for wiping down such things as vial tops

Which of the following statements about tying the extension ladder halyard is MOST accurate?

A. The halyard should be tied using a figure-eight on a bight. B. The halyard should be tied to prevent the fly from slipping. C. The halyard should be tied before resting the ladder against the structure. D. The halyard should be tied differently for closed- and for open-ended halyards.

The membrane of a cell is

a. semipermeable. c. made of enzymes. b. cartilage. d. the mitochondria.