The luteal phase lasts:
A) 12 hours.
B) 24 hours.
C) 4-5 days.
D) 14 days.
D
Explanation: D) Correct. The luteal phase is about 14 days.
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A spleen cell and a myeloma cell are used to produce a monoclonal antibody. How do they help produce a monoclonal antibody?
a. The myeloma cell produces factors that help the spleen cell live longer. b. The myeloma cell and the spleen cell are fused to become one cell, a hybridoma. c. Two myeloma cells fuse with one spleen cell to become a hybridoma. d. Because the myeloma cell is defective, it can't make immunoglobulin, but it takes up just the genetic material from making immunoglobulin from the spleen cell and becomes a hybridoma.
One instructional task performed by teachers is ________.
A. patrolling the locker room B. evaluating student performance C. lunchroom supervision D. attending department meetings
Male condoms reduce the risk of transmission of an STI by ____ percent
a. 50 to 80 b. 95 to 99 c. 30 to 40 d. 80 to 90 e. nearly 50
____ are used to compare the relationship of two quantities with the same units.
A. Parentheses B. Ratios C. Formulas D. Equations