The organisms that causes toxic shock syndrome is ________.
A. Lactococcus lactis
B. Staphylococcus epidermidis
C. Streptococcus pneumoniae
D. Staphylococcus aureus
Answer: D
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Although we must be cautious about oversimplifying, when visible traits are markedly different among human races, a likely explanation is that the differences have been favored by:
A. natural selection and/or sexual selection. B. diversifying selection and/or stabilizing selection. C. allopatric speciation and/or sexual selection. D. disruptive selection and/or natural selection. E. sympatric selection and/or sexual selection.
Prokaryotic cells are ____
a. found only in extreme habitats b. the least common organisms on earth c. easily seen with the naked eye d. stationary organisms e. widespread on the planet
Just before entering the small intestine, what is the pH of chyme?
A) very basic (very high pH) B) slightly basic (high pH) C) neutral (pH near 7) D) acidic (low pH)
Refer to the accompanying figure. During the development of secondary vascular tissues, which of the following
structures is replaced by periderm? a. 1 b. 3 c. 5 d. 6 e. 7