A perennial stream can go months and even years between flow events
Indicate whether the statement is true or false
FALSE
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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.
Geography is ___________.
a. a physical science b. social science c. an art, not a science d. much the same as geology e. a combination of physical and social sciences
Before the U.S. Soil Taxonomy system, soils were classified based on pedogenic regimes
Indicate whether the statement is true or false
Plates move away from each other by 3.5 cm per year at the mid-Atlantic ridge, for a net growth of 7 cm per year for the width of the Atlantic Ocean. How much wider is the Atlantic Ocean today compared to when Columbus discovered the Americas in 1492?
A. about 40 meters B. about 4 meters C. about 400 meters D. about 4 kilometers (4000 meters)