The E. coli long-term evolution (LTEE) experiment tracked E. coli for more than ________ generations
a. 1000
b. 10,000
c. 50,000
d. 1 million
Answer: C
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Individuals that are heavy smokers may eventually have trouble clearing the mucous from their lungs because the structures that move fluid along the epithelial lining of the lung become damaged over time. What are these structures called?
A. Pili B. Flagella C. Cell walls D. Cilia
What invention about 11,000 years ago led to a
boom in the human population?
a. the wheel b. agriculture c. the printing press d. the steam engine e. all of these
The tubelike structure that serves as the birth canal in the human female is the
A. cervix. B. vulva. C. vagina. D. uterus. E. uterine tube.
The synthesis site for the hormones of this figure is indicated by the letter ____
a. A b. B c. C d. D e. E