The success of Chitwan National Park in Nepal is attributed primarily to ____
a. ecotourism
b. exclusion of local residents
c. ecosystem valuation
d. benefits provided to local residents
e. income derived through hunting
D
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Protonephridia are found in ____
a. annelids b. mammals c. flatworms d. insects e. reptiles
One of the buffers that contribute to pH stability in human blood is carbonic acid (H2CO3). Carbonic acid is a weak acid that dissociates into a bicarbonate ion (HCO3-) and a hydrogen ion (H+). Thus,H2CO3 ? HCO3- + H+If the pH of the blood drops, one would expect:
A. the concentration of hydroxide ion (OH-) to increase B. the HCO3- to act as an acid and remove excess H+ with the formation of H2CO3 C. the HCO3- to act as a base and remove excess H+ with the formation of H2CO3 D. a decrease in the concentration of H2CO3 and an increase in the concentration of HCO3- E. the concentration of bicarbonate ion (HCO3-) to increase
A Sense of Proportion: Arrange the following main sequence stars in order of increasing surface temperature:
These microbes do not have an aerobic metabolism, but they can detoxify oxygen enough to live in its presence:
a) microaerophiles b) aerotolerant anaerobes c) facultative anaerobes d) obligate anaerobes