Plague is spread from wild rodents to humans by the bite of an infected tick.
Answer the following statement true (T) or false (F)
False
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Many host races of the apple maggot have been identified; this is an example of allopatric speciation
a. True b. False
In a lotic system ____
a. there is no border between freshwater and terrestrial systems b. water stands in an open basin c. freshwater and marine systems intermix d. water flows through channels e. marshes predominate
Does the interpretation on the estimated coefficient on the treatment change if you use a proxy variable to control for a confounding factor?
A. Yes, the coefficient on the treatment is biased. B. Yes, the coefficient on the treatment suffers from the simultaneity bias. C. No, but instead of getting causal estimate you're only estimating partial correlations. D. No, the estimated coefficient is a consistent estimate of the causal effect.
Some organisms use vitamins as (oxidizers/antioxidants/peroxidases) to be able to live as aerobes.
Fill in the blank(s) with the appropriate word(s).