Using technology in the field of agriculture has enabled farmers to feed a growing human population.
a. true
b. false
a. true
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Which of the following is a neurotransmitter that triggers a contraction of a voluntary muscle?
A) acetylcholine B) action potential C) synapse D) sodium
The element molybdenum is vital in the process of nitrogen fixation. For which crop would molybdenum be most critical to ensure success?
A) wheat B) apples C) cauliflower D) alfalfa
Generally speaking a consequence of using an instrumental variable approach with a weak instrument will be:
A. high (in absolute magnitude) coefficient estimates. B. imprecise coefficient estimates (e.g., large standard errors). C. multicollinearity. D. low coefficient estimates.
Cramps, dizziness, nausea and lack of sweat production are all symptoms of impending heat illness.
a. true b. false