What is the partial pressure of nitrogen if it accounts for 20% of a mixed gas with a total pressure of 1000 mm Hg?
A) 10 mm Hg
B) 200 mm Hg
C) 20 mm Hg
D) 100 mm Hg
E) 0 mm Hg
Answer: B) 200 mm Hg
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According to Fig 9.10, which of the following is NOT responsible for amplifying the signal in a cell responding to adrenaline signaling?
A. the binding of the receptor by adrenaline B. the production of cAMP by adenylyl cyclase C. the activation of protein kinase A by cAMP D. the phosphorylation of proteins by protein kinase A E. All of these choices amplify the adrenaline signal.
Which experiment would be the least effective follow-up to the peacock butterfly studies?
a. Repeat in a forest area totally devoid of native butterflies. b. Repeat in a wildlife sanctuary aviary after giving birds a chance to learn about peacock butterflies. c. Repeat using young, inexperienced birds. d. Repeat, and count survivors for three weeks. e. Repeat using more butterflies and more blue tits in a larger area.
The term species richness refers to the number of species in a specific location
____________________ Indicate whether the statement is true or false.
In estimating a probit or logit model it is typical to maximize which objective function?
A. Likelihood B. T-statistic C. Adjusted R-squared D. Least squares