Which terms accurately reflect the nature of replication of the chromosome in E. coli?
A) unidirectional and fixed point of initiation
B) bidirectional and fixed point of initiation
C) bidirectional and multirepliconic
D) multirepliconic and telomeric
E) unidirectional and reciprocal
B
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Homologous structures are
A. structures of animals that appear to have evolved from different parts of their bodies. B. structures of animals that have different appearances and functions but seem to have evolved from the same body part in a common ancestor. C. structures of animals that have the same appearances and functions but obviously no common ancestor. D. structures of animals that have different appearances and functions but different ancestors.
Pathologists check lymph nodes near tumors for cancer because (select all correct choices):
A. lymphatic tissues are at high risk for transforming into cancer cells. B. lymph nodes near a tumor collect tumor cells that have become metastatic. C. malignant tumors preferentially invade lymph nodes. D. it is easier to detect cancer cells that are formed in lymph nodes. E. cancer cells will always turn a different color in lymph nodes.
Hydrogen, atomic number 1, has 3 isotopes, 1H, 2H, 3H. 1H is comprised of one proton, one neutron and one electron
Indicate whether the statement is true or false.
What are the four major types of tissues?
What will be an ideal response?