What type of diseases require biosafety level (BSL) 4 procedures and facilities when working with samples that may be infected?
A) highly infectious diseases
B) diseases with high mortality
C) diseases for which no treatment or vaccine exist
D) highly infectious diseases with high mortality for which no treatment or vaccine exist
Answer: D
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How do ray-finned fish keep from sinking?
a. they are constantly swimming b. their fins are constantly moving c. they have lungs that are always filled with air d. they have a swim bladder that is filled with gas e. they have a skeleton that is less dense than the surrounding water
Trees with needle-shaped leaves and a thick cuticle with stomata sunk below the leaf surface dominate ____________________.
Fill in the blank(s) with the appropriate word(s).
Which of the following statements about "flesh-eating" streptococci is FALSE?
A) It is caused by a group A streptococcus. B) It is also known as necrotizing fasciitis because it travels along the fascia. C) It causes death in over 50% of cases. D) It is considered a common complication of pyoderma. E) It involves toxemia.
Hydrolysis reactions are catabolic reactions that use water to split the reactant into smaller subunits.
Answer the following statement true (T) or false (F)