The oceans contain about ________% of the Earth's water.
A. 95
B. 93
C. 91
D. 97
Answer: D
You might also like to view...
The standing crop biomass is the ____
a. amount of sunlight absorbed by the plants b. amount of water accumulated per acre of crop plants c. total dry weight of plants at a given time d. number of plant species present e. productivity of the plants
Which of these is a correct statement about pH?
A) The pH of a solution increases as its acidity increases. B) The pH of a basic or alkaline solution is less than that of an acidic solution. C) As the concentration of H+ increases in a solution, the pH decreases. D) A solution to which HCl has been added will have a greater pH than a solution to which NaOH has been added. E) Each number on the pH scale represents an increase of 108.
Which molecule is believed to have preceded the other two during the evolution of life?
A. DNA B. RNA C. Proteins