One of the actions of the birth control pill is to
a. prevent FSH and LH from being released from the hypothalamus.
b. prevent ovulation.
c. stop development of the uterine lining.
d. increase plasma testosterone levels.
e. synchronize the body’s biological clock.
B
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An organism's environment consists of __________.
Fill in the blank(s) with the appropriate word(s).
The single most preventable cause of disease in the United States is:
a. alcohol use. b. tobacco use. c. automobile accidents. d. suicide. e. homicide.
Shown below is a hypothetical DNA sequence from a virus. Also shown is the sequence of the mRNA that is synthesized from this DNA.DNA sequence:5'-AGCACCTGCCGAATGGGCCAAATCCTGCCGAATAAA-3'3'-TCGTGGACGGCTTACCCGGTTTAGGACGGCTTATTT -5'mRNA sequence (G* = G cap):5'-G*AGCACCUGCCGCCUGCCGAAUAAAAAAA....-3' The RNA was most likely transcribed by
A. RNA polymerase II. B. RNA polymerase III. C. RNA polymerase holoenzyme. D. RNA polymerase I.
The differences in the classes of immunoglobulins are due primarily to variations in the Fc fragment.
Answer the following statement true (T) or false (F)