A microbe such as Ebola virus that sickens most everyone that is infected would be characterized as a/an
A. opportunistic pathogen.
B. true pathogen.
C. facultative pathogen.
D. obligate pathogen.
Answer: B
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No matter how much water a human drinks, the kidneys are always regulating various aspects of the blood, including _________________.
I-the pH of the blood II-the plasma concentration of iron ions III-the plasma concentration of sodium ions IV-the plasma concentration of potassium ions V-the temperature of the blood A. I, III, IV, and V B. I, II, III, and IV C. I, II, III, IV, and V D. I, II, and III E. I, III, and IV
The amplitude of a sound wave corresponds to ____
a. loudness b. direction c. frequency d. timbre e. pressure
Salinization is defined as _______________
A. the use of cover crops to manage excess salt B. the removal of salt from seawater C. the loss of biologically productive land to desert D. the effect of salt pollution from winter roadways E. the build up of salts in the topsoil
Progressive changes in the fossil record are evidence for evolution because
A. they show gaps in the fossil record. B. they show descent with modification. C. they show evolutionary change at the level of the individual. D. they show inheritance of acquired characteristics.