The process in which diurnal oxygen shifts can occur in a river after organic matter is added is called ________.
A. self-purification
B. self-oxidation
C. self-eutrophication
D. self-reduction
Answer: A
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Caldarchaeol lipids are extremely thermostable tetraethers found in many ________.
A. psychrophile archaea B. hypersalinic archaea C. autotrophic archaea D. hyperthermophilic archaea
Answer the following statements true (T) or false (F)
1. All infectious diseases are caused by pathogens. 2. Pathogens greatly outnumber nonpathogens. 3. Using microorganisms to clean up the environment is known as bioremediation. 4. Microorganisms are essential in the field of genetic engineering. 5. Microorganisms probably appeared on earth about 3.5 million years ago.
All fungi
a. are saprobes. b. digest food extracellularly. c. are parasites. d. digest food intracellularly. e. can ingest food particles
A nurse tells you that your blood pressure is 112/70. The "70" refers to __________.
a. your heart rate b. the velocity of blood during diastole c. the diastolic pressure from the recoil of the arteries d. the systolic pressure from ventricular contraction e. the venous pressure caused by the compression of the blood pressure cuff