QuestionDecember 16, 2025

__ 18. Which of the following is an example of a bacterial STI? A. HIV. B. Chlamydia. C. HPV. D. Genital herpes. __ 19. The __ period extends from the second to the ninth week of pregnancy. A. embryonic B. germinal C. fetal D. zygote

__ 18. Which of the following is an example of a bacterial STI? A. HIV. B. Chlamydia. C. HPV. D. Genital herpes. __ 19. The __ period extends from the second to the ninth week of pregnancy. A. embryonic B. germinal C. fetal D. zygote
__ 18. Which of the following is an example of a bacterial STI?
A. HIV.
B. Chlamydia.
C. HPV.
D. Genital herpes.
__ 19. The __ period extends from the second to the ninth week of pregnancy.
A. embryonic
B. germinal
C. fetal
D. zygote

Solution
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Answer

18. B. Chlamydia. ### 19. A. embryonic Explanation 1. Identify bacterial STI Chlamydia is caused by bacteria; HIV (virus), HPV (virus), and genital herpes (virus) are not. 2. Identify pregnancy period from second to ninth week The embryonic period spans the second to ninth week; germinal is first two weeks, fetal is after ninth week, zygote is a single cell.

Explanation

1. Identify bacterial STI<br /> Chlamydia is caused by bacteria; HIV (virus), HPV (virus), and genital herpes (virus) are not.<br />2. Identify pregnancy period from second to ninth week<br /> The embryonic period spans the second to ninth week; germinal is first two weeks, fetal is after ninth week, zygote is a single cell.
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