In great tits, increased warming has resulted in
A) earlier egg laying.
B) earlier migration schedules.
C) greater mortality.
D) larger body size.
A
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Which action best illustrates in situ conservation?
a. breeding captive species in zoos b. collecting eggs from nature c. participating in artificial insemination d. breeding captive species and collecting eggs from nature e. designating a large area as a national reserve
How would you expect the root system of a plant grown by hydroponics to compare to the root system of a plant grown in soil?
A) absent B) less developed C) more developed D) the same
In the context of regression analysis, a variable that allows us to isolate the causal effect of a treatment on an outcome due to its exogenous correlation with the treatment is known as a(n):
A. difference in difference estimator. B. dummy variable. C. instrumental variable. D. control variable.
You are wondering whether there is a consistent evolutionary trend for a decrease in size in a family of in-sects. For a meaningful phylogenetically independent comparison, what would you compare in the following table?
columns A B C D rows Genus I Genus II Genus III Genus IV 1 Mean length fossil taxa 22 14 35 15 2 Mean length extant taxa 12 15 28 24 a. The average of row 1 vs. the average of row 2. b. The averages of columns A through D against each other. c. The sum of rows A and B vs. the sum of rows C and D. d. Rows 1 vs. 2 for each column.