Solenopsis invicta or red imported fire ants
(RIFAs) are extremely successful in the United
States because they
a. are resistant to attacks from predators.
b. are resistant to most pesticides.
c. never get troubled with diseases.
d. are resistant to attacks from predators and
never get troubled with diseases.
e. have all of these characteristics
B
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What do all deuterostomes have in common?
A) Adults are bilaterally symmetrical. B) Embryos have pharyngeal pouches that may or may not form gill slits. C) All have a spinal column. D) All have specialized head and tail regions. E) The pore (blastopore) formed during gastrulation becomes the anus.
Bacteria living in a freshwater stream that are transferred to ocean water would
A. be in a hypotonic solution. B. be in an isotonic solution. C. become dehydrated due to the loss of water. D. gain water.
The type of viral infection in which a virus enters a host cell and remains dormant in the host cell's chromosome is
A. a rare form of viral infection. B. a transgenic infection. C. a lytic infection. D. a systematic infection. E. a lysogenic infection.
U.S. health officials are considering different ways of preparing for a future worldwide epidemic of human influenza that could be derived from a form of the disease that infects birds (avian flu)
Which actions would be useful in preventing a future influenza epidemic? A) Inject helper T cells into healthy people to boost immune systems. B) Inoculate infected people with a vaccine against the pathogen. C) Give antibiotics to people with mild symptoms. D) Ask people with flu symptoms to stay at home.