Which of the follow is false concerning the tetanospasmin toxin?
A) taken up by peripheral motor neurons and transported to the spinal cord
B) leads to flaccid paralysis
C) blocks the release of inhibitory neurotransmitters, preventing muscle relaxation
D) causes intense muscle spasms, drooling, sweating, and irritability
E) causes irreversible damage to neurons
Answer: B
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Staphylococcus aureus produces the enzyme ________, which causes blood plasma to clot.
Fill in the blank(s) with the appropriate word(s).
Females who start smoking as teenagers are ________% more likely to develop breast cancer
a. 35 b. 70 c. 20 d. 100 e. 55
_______ is a disease characterized by high transmissibility and low virulence.
A. bubonic plague B. AIDS C. chicken pox D. two of the above
Simberloff and Wilson conducted a well-known experiment in which they fumigated small mangrove islands and observed the recovery through time of arthropod communities on these islands. They found that mangrove islands tended to recover to about the same number of species present pre-fumigation. Which proposition of the equilibrium theory of island biogeography did this observation support?
A) Islands distant from the mainland have fewer species than islands close to the mainland. B) Small islands have fewer species than large islands. C) Each island has an equilibrium number of species.