The earliest evidence of life on Earth is over 3 billion years old. Indicate whether the statement is true or false
T
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pH is a measure of the comparative amounts of hydrogen and hydroxide ions contained in a particular volume of solution, which influences the uptake natural chemicals in soil by plants.
Answer the following statement true (T) or false (F)
What is the difference between a reptile's lower jaw and a mammal's lower jaw?
A)Mammals have 16 teeth in the lower jaw. B)The lower jaw of a reptile is a single bone. C)The lower jaw of a reptile contains no teeth. D)The lower jaw of a mammal is a single bone. E)The lower jaw of a reptile contains 12 teeth.
Which numbered site is likely to have a thin sequence of sediments over crystalline rocks of the basement?
A. 1, the continental shield B. 2, the continental platform C. 3, a basin in the continent D. 4, a continental shelf E. 5, a deep sediment-filled basin next to the continent
Which statement is true with regard to internal waves?
A) ?Internal waves usually move very fast. B) ?Internal waves form at the boundary between water layers of different densities. C) ?Internal waves are only generated by wind energy. D) ?Internal waves form at the junction between air and water.