When a dorsal lip from a newt is attached to the ventral side of another embryo, it results in
a. two separate newts.
b. two attached newts.
c. survival of only the original newt.
d. death of the newt.
e. no observable result.
B
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Respiratory syncytial virus
A. uses the nasopharynx as its main replication site. B. has symptoms of dyspnea and rales. C. can be treated with the antiviral aerosol ribavirin. D. causes serious disease in infants 6 months old or younger. E. All of the choices are correct.
It has been known for some time that fetal cells can be found in a pregnant woman’s bloodstream,
sometimes years after a pregnancy. A new technique has been developed that allows scientists to isolate these fetal cells from a pregnant woman’s blood. Why would this be a useful new tool for parents interested in genetic testing of their fetus?
What will be an ideal response?Botulinum toxin (Botox) produced by certain bacteria will
A) prevent enzymatic breakdown of neurotransmitters. B) cause continual contraction of smooth muscle. C) initiate an increase in the strength of a transmitted signal. D) inhibit the release of acetylcholine.
Which of the following occurs to help the body cope with the stress of altitude?
What will be an ideal response?