In addition to causing skin cancer later in life, ultraviolet light destroys the B vitamin folate. Folate deficiencies in pregnancy may result in birth defects
Which of the following do you
think is a stronger selective pressure for high skin pigmentation in high UV environments?
A. skin cancer prevention
B. birth defect prevention
C. both are equal
A
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The evolutionary history of a group of organisms from a common ancestor is termed:a
biohistory. b. phylogeny. c. phrenology. d. phenetics. e. species origenetics
Which is NOT a major function of proteins?
A. Provides cell structure. B. Stores energy for the cell. C. Functions as regulator molecules in cellular activity. D. Functions as carrier molecules.
What is the first step in genetic recombination?
a) the introduction of single- stranded breaks in aligned DNA molecules b) the exchange of pieces of DNA between homologous chromosomes c) the accurate alignment of DNA molecules d) the introduction of double -stranded breaks in aligned DNA molecules e) lengthening of the chromosomes
Suppose you're running a multiple regression of Home Prices on five different treatment variables including number of bedrooms, number of bathrooms, total square feet, total lot size, and garage size, where all the treatment variables have been standardized (i.e., Which condition transformed to have a mean of zero and standard deviation equal to 1). Which conditions about the multiple regression must hold?
A. Correlation between the residuals and home price equals 0. B. Intercept for the multiple linear regression equals the sample average home price. C. Correlation between each of the treatment variables equals 1. D. Correlation between each of the treatment variables equals 0.