Oral infections with herpes simplex virus 1 can lie dormant in nerve cells for years. When a patient becomes stressed, the virus enters the active stage and forms cold sores on the lips. When the virus is inactive, or dormant, it is in the stage.
A. latent
B. symptomatic
C. lytic
D. infective
E. replicative
A. latent
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The bones and cartilage in animals serve the same function as ________ in plants?
A. xylem B. leaves C. wood D. capillaries E. phloem
If both chromatids of a sister-chromatid pair are found in one daughter cell, what has likely occurred?
a. improper replication of DNA b. failure of maternal and paternal chromosomes to separate c. nondisjunction during meiosis I d. nondisjunction during meiosis II e. an error during crossing-over
Naturally-produced penicillins are most effective against gram-positive bacteria because _______.
Fill in the blank(s) with the appropriate word (s).
The non-leukocyte tissue cells known as ________ produce leukotrienes and prostaglandins in response to allergen binding
A) neutrophils B) basophils C) monocytes D) lymphocytes E) mast cells