Based on the morphological species concept, why would you assume that there are many different
species of rat snakes?
What will be an ideal response?
ANS:The
rat snake is present in many diverse areas of the country. Individual snakes from these different
locations have different banding patterns and do not resemble each other. Based on a morphological
approach, one would assume that they are different species. In reality, they are subspecies that could
successfully mate if brought to a common location.
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When using lacZ containing vectors, colonies containing intact vector turn blue
Indicate whether this statement is true or false.
Eumetazoans are animals having only one tissue layers
____________________ Indicate whether the statement is true or false.
Which of the following statements best describes the jawless fishes?
A. Endotherms that have a smooth nonscaly skin. B. Ectotherms that have a smooth nonscaly skin. C. Vertebrates that have scales and are ectothermic. D. Ectotherms that have a bony skeleton.
Adenine methylase is an enzyme used during mismatch repair (MMR). It helps determine which strand needs to be repaired by discriminating between template and new DNA strand. If this enzyme is mutated, how would MMR be affected?
A) MMR would be hindered because both strands would be overmethylated and both would appear as template DNA strands and it would not be possible to determine which strand has the mutation. B) MMR would not be hindered because adenine methylase is not directly involved in MMR. C) MMR would be hindered because both strands would be unmethylated and both would appear as template DNA strands. D) MMR would be hindered because both strands would be overmethylated and both would appear as new DNA strands and it would not be able to determine which strand has the error. E) MMR would be hindered because both strands would be unmethylated and both would appear as new DNA strands and it would not be able to determine which strand has the error.