What is the correct order of land mass
formation starting with the oldest and moving
towards the most recent?
a. Pangaea ? Gondwana ? Earth's crust
b. Earth's crust ? Pangaea ? Gondwana
c. Earth's crust ? Gondwana ? Pangaea
d. Gondwana ? Earth’s crust ? Pangaea
e. Pangaea ? Earth's crust ? Gondwana
C
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The half-life of Carbon-14 is approximately 5,700 years. Using this information scientists have been able to determine the age of some artifacts left by humans. A scientist wants to know approximately how old a piece of wood was that she found on the floor in an old cave that had recently been discovered. She removed the wood (with permission) to her laboratory. Her wood sample contained 2 grams
of Carbon- 14. If the age of the wood was determined to be 22,800 years old, how much Carbon-14 originally existed in this piece of wood? A. 32 grams B. 16 grams C. 12 grams D. 8 grams E. 4 grams
rDNA in eukaryotes is typically redundant
Indicate whether the statement is true or false
Which of the following reactions is a dehydration reaction?
A. A + B + H2O ? C B. A + H2O ? B + C C. A ? B + C+ H2O D. A + B ? C + H2O
You find a cell of a type you have never seen before. The cell has both a nucleus and a cell wall. Therefore, you conclude that it is likely to be a(n) ________ cell.
A) prokaryotic B) animal C) bacterial D) plant