What is a SNP?
a. a computer chip that recognizes differences in DNA sequences
b. a variation in a single nucleotide of a DNA sequence
c. a tool used in DNA research to cut segments of DNA
d. a drug developed from DNA technology
e. a highly conserved sequence of DNA
ANSWER: b
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The infectious agent(s) that may arise in a wound from a human bite is/are
A. Escherichia coli. B. Bacteroides. C. Actinomyces israelii. D. Staphylococcus aureus. E. Bacteroides AND Staphylococcus aureus.
On an annual basis, the greatest flow of carbon between nonbiological reservoirs takes place between:
a. the atmosphere and Earth's rocks b. the ocean and Earth's rocks c. the ocean and the atmosphere d. plants and Earth's rocks e. aquatic organisms and the atmosphere
Answer the following statements true (T) or false (F)
1.The two main branches off the trachea are called bronchi. 2.Filter feeders are autotrophs. 3.Cows are ruminants that rely on fermenting bacteria to break down plant matter. 4.The stomach organ produces amylase to aid in starch digestion. 5.When a single-celled ciliate protist engulfs a food particle through its mouth-like oral groove, it is performing extracellular digestion.
Pure water without applied pressure has a water potential that is equal to
A. 1.6 MPa. B. 0.0 MPa. C. atmospheric pressure. D. infinity. E. -2.0 MPa.