In eukaryotes, the DNA molecule that comprises a chromosome is ____ and has ____ replication origin
a. circular, one
b. circular, more than one
c. linear, more than one
d. linear, one
e. linear, no
ANSWER: c
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Marine vertebrates are _____ to their environment
A) isotonic B) hypotonic C) hypertonic D) osmotonic
The point of connection between two sister chromatids, before anaphase II of meiosis separates them, is called the
A. centriole B. kinetochore. C. centromere. D. spindle apparatus. E. centrosome.
Recombinant DNA only occurs when you take DNA from another organism and insert it into a bacterium
A. true B. false
Scientists have studied the effects of television watching on the metabolic rate of children and its potential implications for childhood obesity. In a study of 15 obese children and 16 non-obese children, it was found that the metabolic rate of all
children significantly decreased while watching television compared to their metabolic rate when they were at normal rest. The drop was greater for obese children, but the difference in drops between the two groups of children was not statistically significant. What is a reasonable conclusion to draw from this study? A) Television watching does not contribute at all to childhood obesity. B) Television watching likely contributes to adult obesity but not childhood obesity. C) Television watching contributes more to childhood obesity than the overconsumption of sugary foods. D) Television watching is an activity that should be carefully considered when studying factors that may affect childhood obesity.