If you observe rod-shaped, pink cells on a slide that had just been Gram stained, you can assume that their cell walls contain endotoxin.
Answer the following statement true (T) or false (F)
True
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Which would be more likely to cause illness-a water sample that tested positive for coliforms or one that tested positive for E. coli O157:H7?
A. Both would be equally capable of causing illness-all coliforms cause illness. B. The coliform positive sample would be more likely to cause illness. Coliforms are inherently more pathogenic than the weak O157:H7 lab strain of E. coli. C. The E. coli O157:H7 sample would be more likely to cause illness. This strain of bacterium is highly pathogenic and capable of causing kidney damage. D. Neither-there is usually a small amount of coliforms (including E. coli O157:H7) in all water.
The rigid chitinous exoskeleton of an arthropod has all of the following functions except it
A. provides a place for muscle attachment. B. protects the animal from predators. C. impedes water loss. D. maintains a uniform size for all individuals of that species. E. prevents injury to the animal.
A capillary tube is used to acquire a small blood sample for CBC (complete blood count) analysis. Suction is not required to transfer the blood from the fingertip prick to the tube in part due to
A. covalent bonding between the water molecules. B. adhesive forces between the water molecules and the glass particles of the tube. C. ionic bonding between the water molecules. D. cohesive forces between the glass particles of the tube and the water molecules.
What percent of plasma is water?
a. 10 percent b. 27 percent c. 55 percent d. 77 percent e. 92 percent