The development of a hard chancre (an ulcerated sore with hard edges) is indication of what type of STD?

A. yeast infection
B. papillomavirus
C. hepatitis
D. syphilis
E. gonorrhea


Answer: D

Biology & Microbiology

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The immunodeficiency virus that causes acquired immunodeficiency syndrome is a(n) enveloped virus

____________________ Indicate whether the statement is true or false.

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Modern humans possess the same craving for ________ and ________ as our ancestors, despite the obesity these cravings can cause today

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