A cohort is ____.
A. a group of individuals of the same species born during the same time interval
B. any member of the same species
C. a group of individuals with the same parents
D. a group of individuals of the same sex
E. any group of closely related individuals
Answer: A
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What is the consequence to a bacterial cell of a mutation that inactivates the enzyme responsible for methylating the A in the DNA sequence 5? GATC?
A) Replication of the lagging strand cannot be completed. B) Thymine dimers cannot be repaired. C) Parental and new DNA strands cannot be distinguished during mismatch repair. D) Expression of certain metabolic genes is decreased. E) The mutation rate of all genes will be lower.
In the simple linear regression, the intercept will equal the sample average of the outcome (Y) variable if which of the following is true?
A. sCov(X, Y) < 0
B. sCov(X, Y) > 0
C. 
= 0
D. sVar(X) > 0
What is a potential problem with the use of transgenic varieties of plants that contain Bt toxin?
A) Bt toxin may be harmful to humans. B) Bt toxin may be harmful to some beneficial insects. C) Transgenic crop varieties with Bt toxin are not very hardy and require a lot of care. D) Transgenic crop varieties with Bt toxin require large amounts of chemical insecticides to grow.
Characteristics of Bacillus anthracis include all the following except
A. capsule and exotoxins are virulence factors. B. anaerobic. C. reservoir includes infected grazing animals and contaminated soil. D. gram positive bacillus. E. sporeformer