Examlex
Which type of microfossils are organic walled cysts of planktonic algae primarily used in relative dating?
Syphilis
A bacterial infection usually spread by sexual contact that starts as a painless sore and can cause serious health issues if not treated.
Human Immunodeficiency Virus
A retrovirus that causes AIDS by infecting and gradually destroying the immune system.
Syphilis
A sexually transmitted bacterial infection known for causing long-term complications if not treated timely and effectively.
Chancre
A round, pea-sized, painless sore symptomatic of the first stage of syphilis.
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