An elk herd is observed over many generations. Most of the f…
An elk herd is observed over many generations. Most of the full-grown bull elk have antlers of nearly the same size and the size does not change significantly generation after generation. Which of the following effects probably accounts for this situation?
Read DetailsAn 18 year-old patient presents with a 5 day history of very…
An 18 year-old patient presents with a 5 day history of very painful vulvar ulcers that began as small “blisters”. She is also complaining of a low-grad fever and headache. Large painful vulvar and perineal ulcers and inguinal lymphadenopathy are found on examination. The most likely diagnosis is:
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