Imagine that a person breathes in a potentially pathogenic bacterium. What defenses will the bacterium encounter as it travels through the human body? Select all correct choices
A. cilia in the nasal cavity
B. mucus in the lungs (if the bacterium enters
the respiratory tract)
C. digestive enzymes in the stomach (if the
bacterium enters the gastrointestinal tract)
D. phagocytes (if the bacterium enters the
bloodstream)
A,B,C,D
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Loeffler's medium inhibits the growth of MOST organisms and is commonly used to cultivate
A) Corynebacterium diphtheriae. B) Mycobacterium tuberculosis. C) Mycobacterium leprae. D) Staphylococcus aureus.
Comets falling into the inner solar system from the ____________ are called long-period comets
a. Oort cloud b. asteroid belt c. Roche limit d. Kuiper belt e. Widmanstätten region
Which of the following are NOT eukaryotes?
a. fungi b. bacteria c. plants d. animals e. protistans
Which country does NOT have large deforestation issues?
a. Brazil b. Indonesia c. Colombia d. Mexico e. Australia