Mastitis in cows results in infected mammary glands. The use of biotechnologies to introduce the antibiotic gene lysostaphin from Stpahylococcus simulans is an example of generating what type of animal?
A) a knock-out animal B) a synthetic animal
C) a transgenic animal D) a conditional knock-out animal
Answer: C
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Chemosynthetic bacteria are unique:
a. in not requiring CO2. b. because they use energy derived from chemicals. c. because they can produce food with low light. d. and are very common in the twilight depths. e. because many forms are also bioluminescent.
Strand slippage results in ________, which can cause a number of human diseases such as fragile X syndrome
A) tautomeric shift B) double-stranded DNA breaks C) pyrimidine dimer addition D) deletion of large sections of DNA E) the re-replication of highly repetitive DNA sequences
Which geological timescale contains the greatest number of years?
A. Periods B. Epochs C. centuries D. eras E. Decades
Which one of the following is NOT an example of behavior?
A. A plant bending toward a light B. A student sleeping in class C. The wind rustling fallen autumn leaves D. A cat purring