Ions produced from which of the following acids play an important role in biochemistry?
A) acetic
B) boric
C) nitric
D) phosphoric
D
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A climate is classified as "dry" if it receives less than 30 centimeters of rain annually, on average
Indicate whether the statement is true or false
Which of the following is true with regard to mutations?
a. Mutations are always harmful. b. Mutations always provide for beneficial changes in an organism's genetic makeup. c. Mutations are chosen by the organism to improve their survival. d. Natural selection determines the types of mutations that survive in a population. e. Mutations are caused only by harmful chemicals.
Solid aerosols
A) create secondary pollutants and destroy the ozone layer. B) also consist of gases that act as greenhouse gases. C) are more harmful to humans if their size is above PM10. D) can promote or reduce the chance of precipitation.
Moving from an oceanic ridge to an oceanic trench, the thickness of the lithosphere:
a) increases in proportion to the distance. b) randomly varies. c) remains the same. d) is unrelated to the distance from the ridge. e) decreases in proportion to the distance.