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Human Reproduction › View

Which label is the endometrium?

A. 1

B. 2

C. 3

D. 4

E. 8

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Infectious Diseases › View

Smallpox has been eradicated, but not malaria or cholera.

Which statements correctly explain this?

1 Cholera pathogens in the intestines are not destroyed by antibiotics.
2 Plasmodium antigens change during the life cycle.
3 Smallpox antigens remain stable.
4 Vaccines only work against viruses.

A. 1, 2 and 3

B. 1, 2 and 4

C. 1, 3 and 4

D. 2, 3 and 4

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