Which of the following patterns occurs with respect to geographic distribution of species diversity?
A) Diversity increases with increasing latitudes.
B) Diversity increases with increasing longitudes.
C) Diversity increases with decreasing latitudes.
D) Diversity increases with decreasing longitudes.
C
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Which of the following is a facultative, rather than obligate, intracellular pathogen?
A. Rickettsia B. Brucella C. Chlamydia D. All of the choices are correct.
The ________ rate is the relationship of the number of deaths from a given disease to the total number of cases of the disease.
A. index B. prevalence C. mortality D. morbidity
All photoreceptors ________
a. are found in eyes b. convert photon energy to visual images c. are found in vertebrates d. convert photon energy to sensory neuron excitation
Plant cells often have a large membrane-bound sac that is used for storing water and other substances called a:
A. Golgi body. B. central vacuole. C. centriole. D. nucleus. E. chloroplast.