__________ are soils that have roughly equal proportions of sand, silt, and clay.
Fill in the blank(s) with the appropriate word(s).
Loams
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The first step of PCR is called annealing
A. true B. false
In brown air fog, which substance combines with nitrogen dioxide in the sunlight to form
photochemical smog? a. carbon monoxide b. water vapor c. hydrocarbons d. sulfuric acid e. carbon dioxide
If you roll a six-sided die, you would expect to roll a one once out of six rolls
This expected frequency is not observed when rolling the die six times, but the ob-served frequency of rolling a 1 comes out very close to 1/6 when the die is rolled 1,000 times. This demonstrates: a. randomness. b. the law of large numbers. c. the relationship between probability and drift. d. A and B. e. All of the above.
Which of the following are characteristics of self-compatible plants?
A. They are physically isolated. B. Their pollinators are common. C. They are wind pollinated. D. Carpels and stamens are on separate plants.