Total fertility rate (TFR) is high when women marry early and have many children over a long span of years
Indicate whether the statement is true or false
TRUE
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The solvent diethyl ether can be mixed with water but only by shaking the two liquids together. After the shaking is stopped, the liquids separate into two layers, much like oil and vinegar. The free-base form of the alkaloid caffeine is readily soluble in diethyl ether but not in water. Suggest what might happen to the caffeine of a caffeinated beverage if the beverage was first made alkaline with sodium hydroxide and then shaken with some diethyl ether.
A. The water layer would turn a pink color indicating an alkaline pH. B. The caffeine would transform into the free acid and transfer into the diethyl ether. C. The caffeine would transform into the free base and transfer into the diethyl ether. D. The diethyl ether and water would mix into one layer.
The systematic under- or over-prediction of weather phenomena is called ________
Fill in the blank(s) with the appropriate word(s).
Tropical cyclones in the Northern Hemisphere turn ____________. Fill in the blank(s) with the appropriate word(s)
Which adaptive characteristic do organisms within the deep pelagic and benthic communities have in common??
A) ?heavy support structures B) ?gigantism C) ?calcium carbonate exoskeleton D) ?gas-filled internal spaces