How is the Universal Tree of Life constructed?
What will be an ideal response?
Biologists use the polymerase chain reaction to determine the part of the DNA sequence used to encode ribosomal RNA (rRNA). With this information, they can determine the differences in the rRNA of varying organisms. The greater the difference between two organisms' rRNA sequence, the farther apart they are placed on the tree. After a number of genetically diverse organisms are analyzed in this way, the Universal Tree of Life can be created.
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Air mass thunderstorms
A) extinguish themselves through the formation of extensive downdrafts. B) often last for several hours. C) are associated with severe weather. D) usually form at the borders of air masses.
Which of the following is something the World Bank might do?
A) Purchase mineral rights from developing countries B) Construct dams paid for by revenues generated through the sale of electrical power C) Lend money to governments of developing countries for a variety of projects D) Construct highways and navigation canals for increased international commerce
What is an aureole? What will be an ideal response?
Satellites have made ground-based weather stations almost obsolete
Indicate whether the statement is true or false