Opportunistic pathogens such as Legionella, Pseudomonas, and Mycobacterium species have the ability to grow within ________, which may enhance their ability to survive in water distribution systems
A) human saliva
B) fish
C) protists
D) UV irradiated water
Answer: C
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Protists that have a single flagellum are called ____
a. heterokonts b. unikonts c. dikonts d. euglenoids e. rhizarians
What must be true when electrons are passed between protein complexes?
a. Electrons are directly passed from one complex to the next by physical contact. b. The oxidized electron carrier passes on the electron and becomes reduced. c. A proton is translocated to the inner mitochondrial space. d. The matrix decreases in pH. e. The reduced electron carrier passes on the electron and becomes oxidized.
Cnidaria and flatworms exchange gases and remove wastes by way of their
A. open circulatory systems. B. moist skin surfaces. C. closed circulatory systems. D. respiratory and excretory systems. E. gastrovascular cavities.
Some scientists theorize that early life was RNA-based
Indicate whether the statement is true or false