The term that means to “stop bleeding” is ____
a. hemostasis
b. homeostasis
c. coagulation
d. clot retraction
e. vasoconstriction
ANSWER: a
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Refer to the figure above. A branched metabolic pathway synthesizes two related amino acids (D and F). If there is a genetic defect, resulting in a nonfunctional enzyme (3), how could you ensure that adequate amounts of the amino acid F are synthesized?
A) Supplement intermediate B. B) Supplement intermediate C. C) Add enzyme 2 to the medium. D) Supplement with intermediate E.
At the microevolutionary level, natural selection is based on genetic differences that give an individual a selective advantage
Indicate whether the statement is true or false
Assuming you are testing a null hypothesis (two-tailed) about the population mean and determining whether to reject the null hypothesis based on the t-stat at the 95% confidence level, which t-stat would warrant rejecting the null hypothesis?
A. 1.6 B. 3 C. -1.4 D. 1.4
A researcher inserted DNA fragments from an organism into expression vector plasmids and introduced the modified plasmids into bacterial cells. Which of the following methods would be an effective means of identifying which clones contain a specific gene of interest?
A. Sequence the DNA of the plasmids from each isolate. B. Prepare and analyze restriction fragments of the plasmids. C. Isolate clones that still have the vector's genetic marker. D. Use a DNA probe to detect colonies with the inserted DNA. E. Use reverse transcriptase to prepare cDNA copies.