Replication of a bacterial chromosome begins at a specific region called the ____
a. ter
b. replication fork
c. beg
d. ori
e. rep
D
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The animal in the above diagram has __________
a. an open circulatory system b. no capillaries c. a closed circulatory system d. spaces in the tissues for blood to pool in e. none of these
In cell division, toward the end of nuclear division, the cytoplasm divides by a process called ____________________
to produce two identical cells. Fill in the blank(s) with the appropriate word(s).
Any of these events may occur in diseases transmitted by vectors except ________.
A) In biological transmission, a vector transmits pathogens by defecating while taking a blood meal. B) In mechanical transmission, insects contact feces containing pathogenic bacteria and transfer it to food. C) In biological transmission, vectors can spread pathogens by vomiting. D) In biological transmission, pathogens multiply in the vector, which can transmit the pathogens by injecting saliva directly into the host. E) In biological transmission, the vector multiplies in the human host.
Oral sex can transmit the HIV/AIDS virus just as readily as vaginal sex.
a. true b. false