Patients with an extremely advanced bowel obstruction may have feculent breath, which is the odor of:
A) blood.
B) chyme.
C) acetone.
D) stool.
Ans: D) stool.
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The Archaea generally lack which of the following that are normally found in gram-negative bacteria?
A. A complex peptidoglycan network B. Outer membrane C. Lipopolysaccharide D. All of the choices are correct.
The height of pea plants from a cross between parent plants heterozygous for height, in which tall is
dominant, would be: a. all short. b. all tall. c. 1 tall : 3 short. d. 2 short : 2 tall. e. 3 tall : 1 short
The removal of dissolved materials from soil by percolating water is called illuviation
____________________ Indicate whether the statement is true or false.
Darker skin is more prevalent among indigenous people living in areas with high amounts of UV radiation. Nina Jablonski proposed a hypothesis to explain the selective pressure for darker skin in these environments. On which of the following observations did she base this hypothesis?
A) The melanin in darkly pigmented skin protects cells from UV radiation, which can cause skin cancer B) The larger amount of melanin in darkly pigmented skin protects circulating folate from being destroyed by UV radiation C) In general, people with darker skin have lower amounts of folate D) Human populations have different versions of the MC1R gene