During cell division, which noncoding region of a chromosome is necessary for proper cell division?
a. origin of replication
b. telomeres
c. centromeres
d. Okazaki fragments
e. introns
C
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Which of the following statements reflects the second law of thermodynamics?
A. The energy of the starting materials for a reaction will equal the sum of energies of the products plus energy released as heat and disorder. B. The amount of useable energy resulting from a reaction will always be less than the total energy available in the starting materials. C. The entropy of the products of a reaction will always be greater than the entropy of the starting materials. D. The entropy of the starting materials for a reaction will always be greater than the entropy of the products
What structure separates the inner and outer layers that form sponges?
a. spicules b. choanocyte c. osculum d. mesohyl
Logically, which of these should cast the most doubt on the relationships depicted by an evolutionary tree?
A. Some of the organisms depicted by the tree had lived in different habitats. B. None of the organisms depicted by the tree ate the same foods. C. Relationships between DNA sequences among the species did not match relationships between skeletal patterns. D. The skeletal remains of the organisms depicted by the tree were incomplete (in other words, some bones were missing). E. Transitional fossils had not been found.
What would a Lod score of 3.2 tell you about genetic linkage? What information does the ? value tell you?
What will be an ideal response?