In a pedigree chart, a female showing the specific trait being studied is indicated by a ____
a. clear square
b. darkened square
c. clear circle
d. darkened diamond
e. darkened circle
ANSWER: e
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How do the nervous systems of cnidarians and arthropods differ?
What will be an ideal response?
Enzymes work by _____.
a) lowering the activation energy of a reaction and thus speeding up the reaction b) changing the free energy of a reaction and thus speeding up the reaction c) raising the activation energy of a reaction and thus speeding up the reaction d) lowering the delta G of a reaction and thus speeding up the reaction e) raising the delta g of a reaction and thus speeding up the reaction
What is the function of the protein titin?
A. It binds to myosin heads, enabling shortening of the muscle fiber. B. It attaches the myosin thick filament to the Z disk at the end of the sarcomere. C. It transports calcium into and out of the cell. D. It regulates contraction of muscle cells.
Burning coal produces sulfur dioxide in the atmosphere. When combined with rain that falls into bodies of water, this leads to
A. no change in the pH level of the water. B. an increase in pH level of the water. C. a decrease in the pH level of the water. D. a greater concentration of OH- ions in the water.