Which insect functions in the host-to-host transmission of typhus?

A) rat flea
B) body louse
C) dog tick
D) deer tick


Answer: B

Biology & Microbiology

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The most common nematode infection worldwide is (ascariasis/filariasis/pinworms).

Fill in the blank(s) with the appropriate word(s).

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Which of the following is found in every nucleotide?

a. ribose b. a single phosphate group c. a single carbon ring d. a double nitrogen ring e. nitrogen

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Based on their response to a particular hormone from

the anterior pituitary, Sertoli cells of the male are most like __________ of the female. a. uterine cells b. oviducts c. ovarian follicles d. cervix cells e. the corpus luteum

Biology & Microbiology

Spina bifida is one of the most common and most complex birth defects involving the ____ system

a. nervous b. circulatory c. respiratory d. digestive e. endocrine

Biology & Microbiology