Who demonstrated the possibility of producing organic compounds from gases and water if the mixture is exposed to sparks from an electrode?
a. Platt
b. Thompsen
c. Miller and Urey
d. Pauling
e. Starr
c
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Use the following study to answer the following question(s): A current trend among professional baseball players is to wear braided titanium necklaces. The titanium reportedly regulates the flow of energy through the body. The player wearing the necklace then shows improved strength, tires less, and recovers more quickly.Which of the following would be the strongest evidence for or against the necklace's effectiveness?
A. A bar graph illustrating the satisfaction levels of the players who wear the necklace B. A bar graph comparing batting averages of the players who wear the official titanium necklace and those who were unknowingly wearing a fake titanium necklace C. A bar graph comparing the percentage of players who wear the necklace with the percentage of players who do not wear the necklace D. A scatter plot showing days on the disabled list and percentage of players who do or do not wear the necklace
What was the MOST important scientific advance gained from Gregor Mendel's experiments with pea plants?
What will be an ideal response?
Ancestors of ____ may have possessed mitochondria, which were lost or reduced during evolutionary history
a. Paramecium b. Laminaria
c. Amoeba d. Euglena e. Giardia
When potassium ions are transported into guard cells, water
A) leaves the guard cells by osmosis. B) is actively transported out of the guard cells. C) enters the guard cells by osmosis. D) is actively transported into the guard cells. E) moves to the edge of the guard cell.