When experimental plants (e.g., Atriplex prostrata) were grown at high densities,
A) individual growth rates increased.
B) the proportion of resources allocated to leaf production increased.
C) individual plant weight increased.
D) net photosynthetic rate increased.
B
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Which of the following is a common function of membrane proteins? Select all correct choices
A. catalysis B. attachment C. transport D. signal reception
High temperatures increase reaction rates but lower rubisco selectivity for CO2 versus O2. High leaf temperatures thus __________
A. increase photorespiration rates B. decrease photorespiration rates C. increase respiration D. decrease RuBP carboxylation E. increase RuBP carboxylation
Suppose that you have many observations of the employee level longevity and the wage earned by that employee that year. You run the regression Longevityi = ?0 + ?1 Wagei +Ui, and get an estimate of ?1. Now, suppose that a member of the analytics team suggests that education is an omitted variable in your regression and is likely biasing your estimate of ?1. Suppose you knew that, conditional on Wage, more educated employees tended to have shorter stints with the company (lower longevity) and that the error, ?i, in the equation Longevityi = ?0 + ?1Wagei + ?2 Educationi + Ui, was uncorrelated with both Wage and Education. How would you sign the bias on your estimate of ?1?
A. Argue that education is positively correlated with wage and that your estimate of ?1 is a lower bound. B. Argue that education is negatively correlated with wage and that your estimate of ?1 is a lower bound. C. Argue that education is positively correlated with wage and that your estimate of ?1 is an upper bound. D. Argue that education is positively correlated with longevity and that your estimate of ?1 is an upper bound.
Which of these does not occur in a cell during the mitotic cell cycle?
A) Chromosomes line up in single file. B) Sister chromatids pair up and join at the centromere. C) Two daughter nuclei are formed. D) Cytoplasm is divided. E) Centromeres separate.