A.Comets are composed mainly of frozen materials.
B.Comets are much larger than 100m in diameter.
C.Comets often pass close enough to Earth to inter-sect Earth’s atmosphere.
D.Comets orbit the Sun.
第1题
s are found throughout the cell, the scientist supporting the DNA Hypothesis implies that genes are made only of DNA because which of the following are also found only in the nucleus?
A.Amino acids
B.Proteins
C.Gametes
D.Chromosomes
第2题
In Experiment 2, a result of shaking the can of flattasting beverage was that the:
A.number of bubbles in the beverage immediately decreased.
B.mass of the can of beverage increased.
C.roll time of the can of beverage decreased.
D.roll time of the can of beverage increased.
第3题
the O2 in a 6 L vessel compare to the pressure exerted by the O2 in a 3 L vessel? In the 6 L vessel, the O2 pressure will be:
A.as great as in the 3 L vessel.
B.the same as in the 3 L vessel.
C.2 times as great as in the 3 L vessel.
D.4 times as great as in the 3 L vessel.
第4题
B, Algol B produced the majority of its energy by fusing:
A.hydrogen nuclei to make helium nuclei at its center.
B.hydrogen nuclei to make helium nuclei in a shell surrounding its center.
C.helium nuclei to make hydrogen nuclei at its center.
D.helium nuclei to make hydrogen nuclei in a shell surrounding its center.
第5题
volume of titrant added?
A.0.50 mL
B.1.00 mL
C.1.50 mL
D.2.00 mL
第6题
onth period was:
A.less than 50 μg/m2.
B.between 50 μg/m2 and 75 μg/m2.
C.between 75 μg/m2 and 100 μg/m2.
D.greater than 100 μg/m2.
第7题
X on Sphere Y compare to the magnitude of the electrical force exerted by Sphere Y on Sphere X ?
A.The magnitude of the electrical force exerted by Sphere X on Sphere Y was greater than the magnitude of the electrical force exerted by Sphere Y on Sphere X.
B.The magnitude of the electrical force exerted by Sphere X on Sphere Y was less than the magnitude of the electrical force exerted by Sphere Y on Sphere X.
C.The magnitude of the electrical force exerted by Sphere X on Sphere Y was the same as the magnitude of the electrical force exerted by Sphere Y on Sphere X.
D.Cannot be determined from the given information
第8题
at were breeding III. Adults that were not breeding
A.I only
B.III only
C.I and III only
D.I, II, and III
第9题
umber of ZABs present in the stack of 3 batteries was increased. Do the results of Trials 1 and 3 support this prediction?
A.Yes, because the final volume was reached sooner in Trial 3 than it was in Trial 1.
B.Yes, because the final volume was reached sooner in Trial 1 than it was in Trial 3.
C.No, because the final volume was reached sooner in Trial 3 than it was in Trial 1.
D.No, because the final volume was reached sooner in Trial 1 than it was in Trial 3.
第10题
In the 2 studies, the purpose of oven-drying the mixed soil was to remove all the:
A.moisture.
B.organic matter.
C.soil test N.
D.amino sugar N.
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