SARS symptoms include ____
a. high fever, headaches, and respiratory problems
b. brittle bones and rash
c. heart arrhythmia, kidney failure, and calcium depletion
d. liver cirrhosis and difficulty swallowing
e. eye pain, loss of vision, and headaches
a
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Two lakes have the same number of species. Most of the fish in Lake 1 are of a single species, with a few individuals each for the remaining species. Lake 2, on the other hand, has about equal numbers of each species
Which lake has higher species diversity? A) Lake 1 B) Lake 2 C) They are equally diverse. D) The number and relative abundance of species are not related to diversity.
Which is NOT a component of RNA?
A. deoxyribose B. adenine C. phosphate D. uracil
Which of the following organisms have a cell wall composed of silicon?
a) cyanobacteria b) diatoms c) archaebacteria d) euglena e) dinoflagellates
In response to the presence of endotoxin, phagocytes secrete tumor necrosis factor. This causes
A) the disease to subside. B) a decrease in blood pressure. C) a fever. D) a gram-negative infection. E) an increase in red blood cells.