The P/O ratio for passing electrons through complexes I, III and IV is ________.
A) 1
B) 1.5
C) 2
D) 2.5
E) 3
D) 2.5
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Antibodies are
a. proteins. b. steroids. c. polysaccharides. d. lipoproteins. e. any of these
In an experiment, some herbaceous, nonwoody plants were exposed to frequent windy conditions or mechanical shaking for several hours per day. The flexibility of these plants was due to the ________ cells.
A. parenchyma B. sclerenchyma C. periderm D. aerenchyma E. collenchyma
The plasma membrane of eukaryotes contains all of the following except ________.
A. phosphoglycerides B. peptidoglycan C. sphingolipids D. sterols
In an analysis of independent contrast, researchers found that fetuses had faster growth rates in polyandrous than in monogamous species of primates. How did the researchers interpret the results?
a. Fetuses develop faster to "make room" for offspring from a different male. b. Extracting more resources from the mother maximizes offspring's inclusive fitness in polyan-drous species. c. Fast fetal growth rates are always optimal. d. Fetal growth rates represent phylogenetic constraints and are unrelated to mating system.