Four of the five answers listed below are produced by the same germ layer. Select the exception
a. nervous system
b. muscle system
c. circulatory system
d. reproductive system
e. excretory system
A
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When arabinose is present in the environment, the AraC protein acts as a(n) ________ for the E. coli ara operon.
Fill in the blank(s) with the appropriate word(s).
Antibiotics can kill ________________ in the human body, which may sometimes lead to health problems such as inflammatory bowel disease
A. harmful bacteria B. beneficial bacteria C. both harmful and beneficial bacteria D. fungi E. archaeons
Which two sexually transmitted diseases (STDs) commonly occur together?
a. HPV infection and chlamydia b. chlamydia and gonorrhea c. gonorrhea and syphilis d. trichomoniasis and genital herpes e. trichomoniasis and syphilis
All of the following are included in the male parts of a flower EXCEPT
A) ovules. B) anthers. C) pollen. D) stamens.