Which of the following is a common feature of many oral contraceptives?
A) The A ring has been converted to an aromatic ring.
B) The D ring has been enlarged to a six-membered ring.
C) The ketone group in testosterone has been reduced to an alcohol.
D) A -CºCH unit has been attached to carbon-17 of testosterone or a testosterone derivative.
D
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The main force driving thermohaline circulation is ____
A) wind B) the Coriolis effect C) density D) electromagnetic attraction
Which of the following create internal waves?
a) wind stress b) turbidity current c) tidal movement d) passing ships e) all of the above
Eukaryotic cells have a nucleus and other internal structures
a. True b. False
Explain the creation of westerly winds in the upper atmosphere at mid-latitudes and account for seasonal variations in their strength
What will be an ideal response?