What is the definition of the eclipse phase?
A) When the virus is developing but not yet infectious
B) When a virus matures and is capable of infecting a new host
C) When the active, infectious viral particle escapes from the host
D) When the viral DNA becomes latent as a prophage
E) When the virion enters the host cell
Ans: E) When the virion enters the host cell
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Why is wood a remarkably difficult material to decompose? Select all correct choices
A. Wood contains cellulose. B. Wood contains lignin. C. Most bacteria can't break down lignin. D. Most fungi can't break down lignin.
Which type of bacteria can grow in the presence or absence of oxygen?
a. obligate aerobes b. obligate anaerobes c. facultative anaerobes d. obligate aerobes and obligate anaerobes e. obligate anaerobes and facultative anaerobes
Tendons will connect ________ to ________
a. bone, cartilage b. cartilage, muscle c. bone, bone d. bone, muscle e. muscle, muscle
If you touch a hot stove and burn your hand, the pain isn't actually in your hand-it's in your head. What evidence can you provide to substantiate this claim?
A. Interneurons form connections directly from the burned receptor molecules to the brain. B. Motor neurons pull your hand away from the flame, signaling pain to the brain. C. Sensory neurons and interneurons carry the heat sensation to the brain where it is interpreted as painful. D. A reflex arc allows the quick response between the hand and the brain; no interpretation occurs.