____ is the lowest blood pressure of the
cardiac cycle and occurs when the ____.
a. Systolic pressure; ventricles are fully
relaxed
b. Diastolic pressure; ventricles are
contracting
c. Systolic pressure; ventricles are contracting
d. Diastolic pressure; ventricles are fully
relaxed
e. None of these
D
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David has a lab assignment where he must cut out shapes of chromosomes and place two chromosomes of the same shape and size together. Two chromosomes of the same size and shape are termed a ____ pair
Fill in the blank with the appropriate word.
What is the primary difference between natural selection and artificial selection?
A. Natural selection results in evolution; artificial selection does not. B. Artificial selection is driven by humans. C. Artificial selection relies on traits that allow for greater reproductive success. D. Natural selection may select traits that are detrimental. E. Natural selection is controlled.
How is gel electrophoresis used to demonstrate the molecular basis of SCD?
A) by revealing that the protein products of the ?A and ?S alleles have distinctive electrophoretic band patterns B) by revealing variations in the length of a DNA restriction fragment that distinguishes the ?A and ?S alleles C) by revealing variations in the exon splicing of the mRNA products of the ?A and ?S alleles D) by revealing variations in the electrophoretic mobility of proteins and the restriction fragment length polymorphisms of DNA (both A and B) E) by revealing variations in the electrophoretic mobility of proteins, the restriction fragment length polymorphisms of DNA, and the splice variants of the mRNA (A, B, and C)
DNA barcoding:
A: is a type of reverse genetics. B: is the most commonly used type of DNA fingerprinting used by the FBI. C: attempts to provide a unique sequence identifier for all life forms. D: is based mainly on repetitive DNA. E: is used for prenatal genetic screening.