Which of the following types of teeth would be least prevalent and possibly absent in an herbivore?
a. incisors only
b. premolars only
c. molars only
d. canines only
e. both premolars and molars
D
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Which statement is TRUE about Streptococcus pneumoniae and the lung infection it causes?
A) Streptococcus pneumoniae can spread from the focus of infection as a bacteremia. B) Penicillin and erythromycin are the "last chance" drugs for treatment of streptococcal pneumonia. C) Infection with any strain of encapsulated virulent Streptococcus pneumoniae provides long-lasting immunity to all encapsulated virulent strains. D) Streptococcal pneumonia is not as serious as most people think; if left untreated, it usually runs its course in about a week to ten days.
Fluorescence occurs when ____
a. a high-energy electron returns to its ground state by releasing energy in a photon b. a low-energy electron moves to a high-energy state by absorbing heat c. a high-energy electron leaves its nucleus and moves to a different molecule d. a pigment molecule accepts a high energy electron and releases a photon of energy e. the energy from an electron is transferred to a different molecule while the electron returns to the ground state
A contraceptive pill contains
a. estrogen. b. progesterone. c. follicle-stimulating hormone. d. luteinizing hormone. e. both estrogen and progesterone.
The amount of rest needed to recover from physical exertion is _______ related to the intensity of the work performed.
a. not b. inversely c. somewhat d. directly