Antibiotic resistance resulting from altered cellular physiologic structure caused by changes in a microorganism's usual genetic makeup is known as __________ resistance
a. intrinsic
b. inherent
c. acquired
d. environmentally mediated
C
Acquired-resistance mechanisms are all genetically encoded; therefore, the methods for acquisi-tion are those that allow for gene change or exchange. Resistance may be acquired by genetic mutation, gene-transfer mechanisms, or a combination of mutational and gene-transfer events.
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The organ of Corti is located in the:
a. outer ear b. inner ear c. middle ear d. auditory canal e. tympanic membrane
What is the frequency of the heterozygote genotype in this population?
1.0.24
2.0.36
3.0.48
4.0.16
In the section "Investigating Life: The Battle for Position in Cacao Tree Leaves", endophyte spores were sprayed on the cacao leaves. Which of the following is true of the spores?
A. They undergo meiosis. B. They are produced only by fungi. C. Within fungi, they are produced only by endophytes. D. They are haploid. E. They are not cells.
Gene cloning includes all of the following steps EXCEPT:
A) isolating a DNA fragment that contains the gene of interest. B) selecting for colonies that contain the gene to be cloned. C) inserting the gene of interest into a vector. D) using DNA chip to detect the gene of interest. E) transforming the ligated plasmid into