All of the following would help to reduce the amount of greenhouse gases in the atmosphere EXCEPT
a. planting trees.
b. reducing emissions from factories.
c. reducing water usage.
d. using solar heat in homes.
e. walking to work.
C
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The sixth amino acid in normal hemoglobin is
glutamate, but it is replaced by __________ in sickle-cell anemia. a. histidine b. proline c. leucine d. valine e. threonine
The cell junction labeled “B” in the figure
a. prevents movement of materials between cells. b. allows passage of a signal to contract heart muscles. c. allows the free passage of materials between cells. d. is found mostly in stomach tissue. e. is found in most tissues except heart muscle.
Ananda Chakrabarty received the first U.S. patent for a GM organism. This organism was ________
A) a transgenic mouse expressing the growth hormone gene B) the GloFish C) Dolly the cloned sheep D) cloned E. coli E) Pseudomonas engineered to degrade petroleum
The initiation of the S phase and the M phase of the cell cycle depends on a pair of molecules called _______ and _______.
a. actin; myosin b. Cdk's; cyclin c. ligand; receptor d. MSH; MSH-receptor e. ATP; ATPase