All viruses have genes encoding at least:
a. their coat proteins.
b. enzymes required for nucleic acid replication.
c. their coat proteins and enzymes required for nucleic acid replication.
d. a plasma membrane.
e. their coat proteins and a plasma membrane.
C
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The palolo worm reproduces by ____ reproduction, and their biological clock is timed by ____
a. asexual; periods of moonlight b. sexual; periods of moonlight c. asexual; the age of the worm d. sexual; the age of the worm e. asexual; the temperature of their environment
In a normal mammalian birth, how does the body guarantee that birth proceeds to completion?
A. Via positive feedback -- stretching of the uterus by the descending fetus induces release of oxytocin from the posterior pituitary causing even stronger uterine contractions. B. Via negative feedback -- stretching of the uterus by the descending fetus induces release of FSH and LH from the posterior pituitary causing even stronger uterine contractions. C. Via positive feedback -- stretching of the uterus by the descending fetus induces release of prolactin from the posterior pituitary causing even stronger uterine contractions. D. Via negative feedback -- stretching of the uterus by the descending fetus induces release of prostaglandins from the posterior pituitary causing weaker uterine contractions.
What is the role of mast cells in the inflammatory response?
What will be an ideal response?
Where are ion channels localized?
A) in the cytoplasm B) on the intracellular surface of plasma membranes C) spanning plasma membranes D) on the extracellular surface of plasma membranes